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Henan Allgreen Chemical Co.,Ltd

high quality Appearance:white powder Storage:Sealed, dry, microtherm , avoid light and smell. Package:According to the demand of customer Application:Organic synthesis Transportation:by air or by sea Port:shanghai

3-Methyl-2-pyrazolin-5-one

Cas:108-26-9

Min.Order:1 Kilogram

Negotiable

Type:Manufacturers

inquiry

Ality Chemical Corporation

The above product is Ality Chemical's strong item with best price, good quality and fast supply. Ality Chemical has been focusing on the research and production of this field for over 14 years. At the same time, we are always committed to providi

Factory Supply 2,4-dihydro-5-methyl-3H-pyrazol-3-one

Cas:108-26-9

Min.Order:1

Negotiable

Type:Other

inquiry

Enke Pharma-tech Co.,Ltd. (Cangzhou, China )

Cangzhou Enke Pharma Tech Co.,ltd. is located in Cangzhou City, Hebei province ,where is a famous petroleum chemical industry city in China. Enke Pharma a high-tech enterprise ,and we are dedicated to developing and manufacturing new api, intermedi

3-Methyl-2-pyrazolin-5-one

Cas:108-26-9

Min.Order:1 Kilogram

FOB Price: $5.0

Type:Manufacturers

inquiry

Dayang Chem (Hangzhou) Co.,Ltd.

DayangChem exported this product to many countries and regions at best price in China. If you are looking for the product’s supplier in China, DayangChem is your best choice. As a leading manufacturer and supplier of chemicals in China, Day

3-Methyl-2-pyrazolin-5-one

Cas:108-26-9

Min.Order:1 Kilogram

FOB Price: $4.0

Type:Lab/Research institutions

inquiry

Chemwill Asia Co., Ltd.

Our main production base is located in Xuzhou industry park. We are certified both to the ISO 9001 and ISO 14001 Standards, have a safety management system in place.Our R&D team masters core technology for process-design of target building block

3-Methyl-5-pyrazolone

Cas:108-26-9

Min.Order:5 Kiloliter

FOB Price: $1.2 / 5.0

Type:Manufacturers

inquiry

Hebei Nengqian Chemical Import and Export Co., LTD

Our Advantage Rich Experience Our products are sold all over Europe,North&South America, Sino-East, Asia and pacific area as well as Africa,we establish long term. Quality service Company cooperates with research institutes. We strictly con

3-Methyl-2-pyrazolin-5-one CAS 108-26-9

Cas:108-26-9

Min.Order:1 Kilogram

FOB Price: $1.0 / 10.0

Type:Trading Company

inquiry

Zhuozhou Wenxi import and Export Co., Ltd

WITH US,YOUR MONEY IN SAFE,YOUR BUSINESS IN SAFE 1)Quick Response Within 12 hours; 2)Quality Guarantee: All products are strictly tested by our QC, confirmed by QA and approved by third party lab in China, USA, Canada, Germany, UK, Italy, France et

Pharmaceutical Grade CAS 108-26-9 with competitive price

Cas:108-26-9

Min.Order:1 Kilogram

FOB Price: $139.0 / 210.0

Type:Trading Company

inquiry

Shanghai Minstar Chemical Co., Ltd

Product Name: 3-Methyl-2-pyrazolin-5-one Synonyms: 3-Methyl-4,5-dihydro-1H-pyrazole-5-one;5-Methyl-2,4-dihydro-3H-pyrazole-3-one;3-Methyl-2-pyrazolin-5-one,99%;3-methyl pyrazole-5-one;3-Methyl-5-pyrazolone, 99%, 99%;TIMTEC-BB SBB004372;2-Pyrazo

3-Methyl-2-pyrazolin-5-one

Cas:108-26-9

Min.Order:1 Gram

Negotiable

Type:Lab/Research institutions

inquiry

Shanghai Upbio Tech Co.,Ltd

1.In No Less 10 years exporting experience. you can 100% received goods 2.Lower Price with higher quality 3,Free sample 4,We are sincerely responsible for the "product quality" and "After Service" Upbio is Specializ

3H-Pyrazol-3-one,2,4-dihydro-5-methyl-

Cas:108-26-9

Min.Order:1 Gram

Negotiable

Type:Lab/Research institutions

inquiry

Henan Wentao Chemical Product Co., Ltd.

Henan Wentao Chemical Product Co.,Ltd is Located in Zhengzhou High-tech Development Zone with import and export license, We passed ISO 9001:2008 as well, Henan Wentao has developed more than 1000 compounds, which are widely used in the fields of prod

CAS NO.:108-26-9

Cas:108-26-9

Min.Order:0

Negotiable

Type:Lab/Research institutions

inquiry

Hangzhou Keyingchem Co.,Ltd

Hangzhou KeyingChem Co., Ltd. exported this product to many countries and regions at best price. If you are looking for the material’s manufacturer or supplier in China, KeyingChem is your best choice. Pls contact with us freely for getting det

3-Methyl-2-pyrazolin-5-one

Cas:108-26-9

Min.Order:0 Metric Ton

Negotiable

Type:Lab/Research institutions

inquiry

Hangzhou J&H Chemical Co., Ltd.

J&H CHEM R&D center can offer custom synthesis according to the contract research and development services for the fine chemicals, pharmaceutical, biotechnique and some of the other chemicals. J&H CHEM has some Manufacturing base in Jia

3H-Pyrazol-3-one,2,4-dihydro-5-methyl-

Cas:108-26-9

Min.Order:0

Negotiable

Type:Lab/Research institutions

inquiry

Henan Tianfu Chemical Co., Ltd.

3-Methyl-2-pyrazolin-5-one Basic information Product Name: 3-Methyl-2-pyrazolin-5-one Synonyms: 3-Methyl-4,5-dihydro-1H-pyrazole-5-one;5-Methyl-2,4-dihydro-3H-p

108-26-9 C4H6N2O 3-Methyl-2-pyrazolin-5-one

Cas:108-26-9

Min.Order:1 Metric Ton

Negotiable

Type:Lab/Research institutions

inquiry

Hangzhou Huarong Pharm Co., Ltd.

We Huarong Pharm can provide Customized Synthesis & Process R&D & APIs and intermediates Production & Quality Research & Registration Application, especially our GMP validation service which complies with SFDA, FDA, WHO and EU EMPA. O

3-Methyl-2-pyrazolin-5-one

Cas:108-26-9

Min.Order:0

Negotiable

Type:Trading Company

inquiry

Hunan chemfish Pharmaceutical co.,Ltd

Appearance:95%+ Package:R&D,Pilot run Transportation:per client require Port:Express ,Air, Sea

3-Methyl-2-pyrazolin-5-one

Cas:108-26-9

Min.Order:0

Negotiable

Type:Manufacturers

inquiry

Suzhou Sibian Chemical Technology Co., Ltd

The process is mature and can be mass produced to 100 kg, with good quality and purity up to 99%.The product has a large stock and can be supplied stably. Package:bottle Application:Drug R&D Transportation:Sealed drying(25℃) Port:ShangHai

3-Methyl-2-pyrazolin-5-one

Cas:108-26-9

Min.Order:1 Gram

Negotiable

Type:Lab/Research institutions

inquiry

Kono Chem Co.,Ltd

high purity lowest priceAppearance:solid or liquid Storage:in sealed air resistant place Package:drum and bag Application:for pharma use Transportation:by sea or air Port:Beijing or Guangzhou

3-Methyl-5-Pyrazolone

Cas:108-26-9

Min.Order:0

Negotiable

Type:Other

inquiry

Hangzhou Dingyan Chem Co., Ltd

R & D enterprises have their own stock in stockAppearance:To be subject to the object Package:Customized Application:pharmaceutical intermediates Transportation:Air Port:Shanghai;Guangzhou

3-Methyl-2-pyrazolin-5-one

Cas:108-26-9

Min.Order:0

Negotiable

Type:Manufacturers

inquiry

GIHI CHEMICALS CO.,LIMITED

high purity,in stock Package:25kg/drum,or as per customers'demand Application:API,Pharmaceutical intermediates Transportation:air,sea,courier

3-Methyl-2-pyrazolin-5-one

Cas:108-26-9

Min.Order:0

Negotiable

Type:Lab/Research institutions

inquiry

Wuhan Fortuna Chemical Co.,Ltd

stable supply&competitive price Storage:Available Package:25KG Or as client requirement Application:Important pharm intermediate Transportation:By air or By sea

3-Methyl-5-Pyrazolone

Cas:108-26-9

Min.Order:0

Negotiable

Type:Trading Company

inquiry

Shanghai Acmec Biochemical Technology Co., Ltd.

Acmec is a leading manufacturer and supplier of biochemical reagents and life science products. We have over 40,000 items in stock (real-time inventory) and offer discounted prices to registered members of the online store ( www.acmec.com.cn ) Appea

Acmec 3-Methyl-5-pyrazolone 1kg

Cas:108-26-9

Min.Order:1 bottle

Negotiable

Type:Lab/Research institutions

inquiry

Aecochem Corp.

Our clients, like BASF,CHEMO,Brenntag,ASR,Evonik,Merck and etc.Appearance:COA Storage:in stock Application:MSDS/TDS

3-Methyl-5-Pyrazolone

Cas:108-26-9

Min.Order:0

Negotiable

Type:Manufacturers

inquiry

Xi`an Eastling Biotech Co., Ltd.

high purity lowest priceAppearance:solid or liquid Storage:in sealed air resistant place Package:Foil bag; Drum; Plastic bottle Application:Pharma;Industry;Agricultural Transportation:by sea or air Port:Beijing or Guangzhou

3-Methyl-2-pyrazolin-5-one

Cas:108-26-9

Min.Order:0

Negotiable

Type:Lab/Research institutions

inquiry

Hubei Taiho Chemical Co.,LTD

TAIHO Unique Advantages:1.We're factory2.Free samples available3.Commodity inspection can be done4.ISO9001,Kosher certifications5.10 years experiences Storage:Store in cool &dry place Package:aluminium foil bag/fiber can/plastic drum Application:comp

3-Methyl-1H-pyrazol-5(4H)-one

Cas:108-26-9

Min.Order:0

Negotiable

Type:Manufacturers

inquiry

Antimex Chemical Limied

Ansciep Chemical is a professional enterprise manufacturing and distributing fine chemicals and speciality chemicals. We have been dedicated to heterocycle compounds and phenyl rings for tens of years. This is our mature product for export. Our quali

3-Methyl-5-pyrazolone

Cas:108-26-9

Min.Order:0

Negotiable

Type:Lab/Research institutions

inquiry

BOC Sciences

We are committed to providing our customers with the best products and services at the most competitive prices.Appearance:white to light yellow crystal powder Storage:Room temperature with sealed well Package:according to the clients requirement Appl

3-Methyl-5-Pyrazolone

Cas:108-26-9

Min.Order:0

Negotiable

Type:Trading Company

inquiry

Hangzhou Fandachem Co.,Ltd

3-Methyl-2-pyrazolin-5-one cas 108-26-9Appearance:white crystalline powder Storage:Store in dry, dark and ventilated place Package:25KG drum Application:intermediate Transportation:by air, by sea, by express

3-Methyl-2-pyrazolin-5-one cas 108-26-9

Cas:108-26-9

Min.Order:0

Negotiable

Type:Other

inquiry

Shaanxi Cuicheng Biomedical Technology Co., Ltd.

factory?direct?saleAppearance:powder Storage:In cool ,dry place Package:G/bottle; Kg/bag; 1594kg/barrel Application:for pharma use Transportation:Air or sea freight Port:Any main ports of China

3-methyl-5-pyrazolone

Cas:108-26-9

Min.Order:0

Negotiable

Type:Other

inquiry

SAGECHEM LIMITED

108-26-9 Application:intermediate

3-methyl-5-pyrazolone

Cas:108-26-9

Min.Order:0

Negotiable

Type:Lab/Research institutions

inquiry

Shanghai Yuanye Bio-Technology Co., Ltd.

good quality, competitive price, thoughtful after sale serviceAppearance:white powder Storage:Keep it in dry,shady and cool place Package:5g Application:Pharma;Industry;Agricultural;chemical reaserch Transportation:by express or by sea Port:Any port

3-Methyl-5-pyrazolone

Cas:108-26-9

Min.Order:0

Negotiable

Type:Trading Company

inquiry

Synthetic route

ethyl acetoacetate
141-97-9

ethyl acetoacetate

3-methyl-2-pyrazoline-5-one
108-26-9

3-methyl-2-pyrazoline-5-one

Conditions
ConditionsYield
With hydrazine In tetrahydrofuran; ethanol at 0 - 60℃; for 26h; Inert atmosphere;100%
With hydrazine hydrate at 20℃; for 0.0333333h; Knorr Pyrazole Synthesis;100%
With hydrazine for 0.00833333h;94%
hydrazine hydrate

hydrazine hydrate

ethyl acetoacetate
141-97-9

ethyl acetoacetate

3-methyl-2-pyrazoline-5-one
108-26-9

3-methyl-2-pyrazoline-5-one

Conditions
ConditionsYield
With barium(II) hydroxide In water at 26℃; for 0.75h; Green chemistry;100%
acetoacetic acid methyl ester
105-45-3

acetoacetic acid methyl ester

3-methyl-2-pyrazoline-5-one
108-26-9

3-methyl-2-pyrazoline-5-one

Conditions
ConditionsYield
With hydrazine hydrate In methanol at 50℃; for 3h; Temperature; Inert atmosphere;97.3%
With hydrazine In ethanol
N-acetoacetylphenylhydroxyloamine
27991-08-8

N-acetoacetylphenylhydroxyloamine

A

N,N'-bis(isonicotinoyl)hydrazine
4329-75-3

N,N'-bis(isonicotinoyl)hydrazine

B

N-Phenylhydroxylamine
100-65-2

N-Phenylhydroxylamine

C

3-methyl-2-pyrazoline-5-one
108-26-9

3-methyl-2-pyrazoline-5-one

D

azoxybenzene
495-48-7

azoxybenzene

Conditions
ConditionsYield
With isoniazid; triethylamine In chloroform for 24h; Heating; Further byproducts given;A 39.5%
B 32.7%
C 90%
D 22%
N-acetoacetylphenylhydroxyloamine
27991-08-8

N-acetoacetylphenylhydroxyloamine

isoniazid
54-85-3

isoniazid

A

N,N'-bis(isonicotinoyl)hydrazine
4329-75-3

N,N'-bis(isonicotinoyl)hydrazine

B

N-Phenylhydroxylamine
100-65-2

N-Phenylhydroxylamine

C

N-hydroxy-N-phenylisonicotinamide
143997-57-3

N-hydroxy-N-phenylisonicotinamide

D

3-methyl-2-pyrazoline-5-one
108-26-9

3-methyl-2-pyrazoline-5-one

Conditions
ConditionsYield
triethylamine In chloroform for 24h; Heating; Further byproducts given;A 39.5%
B 32.7%
C 23%
D 90%
isoniazid
54-85-3

isoniazid

A

N,N'-bis(isonicotinoyl)hydrazine
4329-75-3

N,N'-bis(isonicotinoyl)hydrazine

B

N-Phenylhydroxylamine
100-65-2

N-Phenylhydroxylamine

C

N-hydroxy-N-phenylisonicotinamide
143997-57-3

N-hydroxy-N-phenylisonicotinamide

D

3-methyl-2-pyrazoline-5-one
108-26-9

3-methyl-2-pyrazoline-5-one

Conditions
ConditionsYield
With N,O-diacetylphenylhydroxylamine; triethylamine In chloroform for 24h; Heating; Further byproducts given;A 39.5%
B 32.7%
C 23%
D 90%
ethyl acetoacetate
141-97-9

ethyl acetoacetate

N2H4*H2O

N2H4*H2O

3-methyl-2-pyrazoline-5-one
108-26-9

3-methyl-2-pyrazoline-5-one

Conditions
ConditionsYield
In ethanol Condensation; Cyclization;87%
ethyl 2-acetyl-4,4,5,5,6,6,7,7,7-nonafluoro-3-oxoheptanoate
116206-94-1

ethyl 2-acetyl-4,4,5,5,6,6,7,7,7-nonafluoro-3-oxoheptanoate

phenylhydrazine
100-63-0

phenylhydrazine

A

2,2,3,3,4,4,5,5,5-Nonafluoro-pentanoic acid N'-phenyl-hydrazide
77146-67-9

2,2,3,3,4,4,5,5,5-Nonafluoro-pentanoic acid N'-phenyl-hydrazide

B

3-methyl-2-pyrazoline-5-one
108-26-9

3-methyl-2-pyrazoline-5-one

Conditions
ConditionsYield
In diethyl ether at -30 - -25℃; for 1h;A 84%
B n/a
2-Acetyl-4,4,5,5,6,6,7,7,8,8,9,9,9-tridecafluoro-3-oxo-nonanoic acid ethyl ester
115479-07-7

2-Acetyl-4,4,5,5,6,6,7,7,8,8,9,9,9-tridecafluoro-3-oxo-nonanoic acid ethyl ester

phenylhydrazine
100-63-0

phenylhydrazine

A

2,2,3,3,4,4,5,5,6,6,7,7,7-Tridecafluoro-heptanoic acid N'-phenyl-hydrazide
77146-68-0

2,2,3,3,4,4,5,5,6,6,7,7,7-Tridecafluoro-heptanoic acid N'-phenyl-hydrazide

B

3-methyl-2-pyrazoline-5-one
108-26-9

3-methyl-2-pyrazoline-5-one

Conditions
ConditionsYield
In diethyl ether at -30 - -25℃; for 1h;A 79%
B n/a
ethyl acetoacetate
141-97-9

ethyl acetoacetate

N-d-pseudoephedrinylacetic acid hydrazide
269727-55-1

N-d-pseudoephedrinylacetic acid hydrazide

A

3-methyl-2-pyrazoline-5-one
108-26-9

3-methyl-2-pyrazoline-5-one

B

(5S,6S)-4,5-dimethyl-6-phenyl-2-morpholone
206256-43-1

(5S,6S)-4,5-dimethyl-6-phenyl-2-morpholone

Conditions
ConditionsYield
In isopropyl alcohol for 10h; Condensation; cyclization; elimination; Heating;A n/a
B 68%
phenylhydrazine
100-63-0

phenylhydrazine

ethyl 2-acetylacetoacetate
603-69-0

ethyl 2-acetylacetoacetate

A

3-methyl-2-pyrazoline-5-one
108-26-9

3-methyl-2-pyrazoline-5-one

B

1-acetyl-2-phenylhydrazine
114-83-0

1-acetyl-2-phenylhydrazine

Conditions
ConditionsYield
In diethyl ether at -30 - -25℃;A n/a
B 64%
ethyl acetoacetate
141-97-9

ethyl acetoacetate

N-l-ephedrinylacetic acid hydrazide
269727-54-0

N-l-ephedrinylacetic acid hydrazide

A

(5S,6R)-4,5-dimethyl-6-phenylmorpholin-2-one
130753-28-5

(5S,6R)-4,5-dimethyl-6-phenylmorpholin-2-one

B

3-methyl-2-pyrazoline-5-one
108-26-9

3-methyl-2-pyrazoline-5-one

Conditions
ConditionsYield
In isopropyl alcohol for 10h; Condensation; cyclization; elimination; Heating;A 62%
B n/a
resin-OCOCH2COMe

resin-OCOCH2COMe

3-methyl-2-pyrazoline-5-one
108-26-9

3-methyl-2-pyrazoline-5-one

Conditions
ConditionsYield
With hydrazine In dichloromethane at 20℃; for 19h;50%
2-Acetyl-4,4,5,5,6,6,7,7,8,8,9,9,9-tridecafluoro-3-oxo-nonanoic acid ethyl ester
115479-07-7

2-Acetyl-4,4,5,5,6,6,7,7,8,8,9,9,9-tridecafluoro-3-oxo-nonanoic acid ethyl ester

phenylhydrazine
100-63-0

phenylhydrazine

A

2,2,3,3,4,4,5,5,6,6,7,7,7-Tridecafluoro-heptanoic acid N'-phenyl-hydrazide
77146-68-0

2,2,3,3,4,4,5,5,6,6,7,7,7-Tridecafluoro-heptanoic acid N'-phenyl-hydrazide

B

5-Methyl-1-phenyl-3-tridecafluorohexyl-1H-pyrazole-4-carboxylic acid ethyl ester
119403-56-4

5-Methyl-1-phenyl-3-tridecafluorohexyl-1H-pyrazole-4-carboxylic acid ethyl ester

C

3-methyl-2-pyrazoline-5-one
108-26-9

3-methyl-2-pyrazoline-5-one

Conditions
ConditionsYield
In ethanol at -30 - -25℃; for 1h;A n/a
B 27%
C n/a
ethyl 2-(1-adamantylcarbonyl)-3-oxobutanoate
896109-93-6

ethyl 2-(1-adamantylcarbonyl)-3-oxobutanoate

A

3-(1-adamantyl)-4,5-dihydro-1H-pyrazol-5-one
496938-13-7

3-(1-adamantyl)-4,5-dihydro-1H-pyrazol-5-one

B

adamantane-1-carbohydrazide
17846-15-0

adamantane-1-carbohydrazide

C

3-methyl-2-pyrazoline-5-one
108-26-9

3-methyl-2-pyrazoline-5-one

Conditions
ConditionsYield
With hydrazine hydrate In ethanol Cooling;A 25%
B 24%
C 11%
ethyl 2-acetyl-4,4,5,5,6,6,7,7,7-nonafluoro-3-oxoheptanoate
116206-94-1

ethyl 2-acetyl-4,4,5,5,6,6,7,7,7-nonafluoro-3-oxoheptanoate

phenylhydrazine
100-63-0

phenylhydrazine

A

2,2,3,3,4,4,5,5,5-Nonafluoro-pentanoic acid N'-phenyl-hydrazide
77146-67-9

2,2,3,3,4,4,5,5,5-Nonafluoro-pentanoic acid N'-phenyl-hydrazide

B

5-Methyl-3-nonafluorobutyl-1-phenyl-1H-pyrazole-4-carboxylic acid ethyl ester
119403-55-3

5-Methyl-3-nonafluorobutyl-1-phenyl-1H-pyrazole-4-carboxylic acid ethyl ester

C

3-methyl-2-pyrazoline-5-one
108-26-9

3-methyl-2-pyrazoline-5-one

Conditions
ConditionsYield
In ethanol at -30 - -25℃; for 1h;A n/a
B 14%
C n/a
3-methyl-5-oxo-3-pyrazolin-1-carboxamide
89179-80-6

3-methyl-5-oxo-3-pyrazolin-1-carboxamide

3-methyl-2-pyrazoline-5-one
108-26-9

3-methyl-2-pyrazoline-5-one

ethyl 3-(acetyl hydrazono)butanoate
5204-15-9

ethyl 3-(acetyl hydrazono)butanoate

3-methyl-2-pyrazoline-5-one
108-26-9

3-methyl-2-pyrazoline-5-one

Conditions
ConditionsYield
geht allmaehlich in 3-Methyl-pyrazolon-(5) ueber;
N-carboxiamino-hidrazona del acetilacetato de etilo
5982-65-0

N-carboxiamino-hidrazona del acetilacetato de etilo

3-methyl-2-pyrazoline-5-one
108-26-9

3-methyl-2-pyrazoline-5-one

Conditions
ConditionsYield
at 120℃;
S-ethyl acetothioacetate
3075-23-8

S-ethyl acetothioacetate

A

1,2-dihydro-5-methyl-3H-pyrazol-3-one
4344-87-0

1,2-dihydro-5-methyl-3H-pyrazol-3-one

B

5-Hydroxy-5-methyl-pyrazolidin-3-one
78024-98-3

5-Hydroxy-5-methyl-pyrazolidin-3-one

C

3-methyl-2-pyrazoline-5-one
108-26-9

3-methyl-2-pyrazoline-5-one

D

ethanethiol
75-08-1

ethanethiol

Conditions
ConditionsYield
With hydrazine In methanol; water at 30℃; not separated;
With hydrazine In methanol; water at 30℃; Rate constant; Kinetics; Mechanism;
ethyl acetoacetate (Z)-semicarbazone
160808-62-8

ethyl acetoacetate (Z)-semicarbazone

A

hydrazodicarboxamide
110-21-4

hydrazodicarboxamide

B

3-methyl-2-pyrazoline-5-one
108-26-9

3-methyl-2-pyrazoline-5-one

Conditions
ConditionsYield
In water for 1h; Heating;A 0.30 g
B 0.12 g
sulfuric acid
7664-93-9

sulfuric acid

3-ethoxy-5-methyl-1H-pyrazole
3201-21-6

3-ethoxy-5-methyl-1H-pyrazole

3-methyl-2-pyrazoline-5-one
108-26-9

3-methyl-2-pyrazoline-5-one

Conditions
ConditionsYield
at 140 - 150℃;
3-methyl-5-oxo-3-pyrazolin-1-carboxamide
89179-80-6

3-methyl-5-oxo-3-pyrazolin-1-carboxamide

water
7732-18-5

water

3-methyl-2-pyrazoline-5-one
108-26-9

3-methyl-2-pyrazoline-5-one

2-[amino(thioxo)methyl]-5-methyl-2,3-dihydro-1H-3-pyrazolone
35290-52-9

2-[amino(thioxo)methyl]-5-methyl-2,3-dihydro-1H-3-pyrazolone

water
7732-18-5

water

3-methyl-2-pyrazoline-5-one
108-26-9

3-methyl-2-pyrazoline-5-one

water
7732-18-5

water

ethyl acetoacetate
141-97-9

ethyl acetoacetate

hydrazine hydrate
7803-57-8

hydrazine hydrate

3-methyl-2-pyrazoline-5-one
108-26-9

3-methyl-2-pyrazoline-5-one

2-[amino(thioxo)methyl]-5-methyl-2,3-dihydro-1H-3-pyrazolone
35290-52-9

2-[amino(thioxo)methyl]-5-methyl-2,3-dihydro-1H-3-pyrazolone

concentrated alcoholic KOH-solution

concentrated alcoholic KOH-solution

3-methyl-2-pyrazoline-5-one
108-26-9

3-methyl-2-pyrazoline-5-one

2-[amino(thioxo)methyl]-5-methyl-2,3-dihydro-1H-3-pyrazolone
35290-52-9

2-[amino(thioxo)methyl]-5-methyl-2,3-dihydro-1H-3-pyrazolone

concentrated aqueous KOH-solution

concentrated aqueous KOH-solution

3-methyl-2-pyrazoline-5-one
108-26-9

3-methyl-2-pyrazoline-5-one

ethanol
64-17-5

ethanol

Dehydracetic acid
520-45-6

Dehydracetic acid

hydrazine hydrate (2 mol )

hydrazine hydrate (2 mol )

3-methyl-2-pyrazoline-5-one
108-26-9

3-methyl-2-pyrazoline-5-one

Conditions
ConditionsYield
at 120℃; im Druckrohr;
piperidine
110-89-4

piperidine

ethyl acetoacetate
141-97-9

ethyl acetoacetate

2-phenylacetylhydrazine
937-39-3

2-phenylacetylhydrazine

A

1,2-di(phenylacetyl)hydrazine
793-25-9

1,2-di(phenylacetyl)hydrazine

B

3-methyl-2-pyrazoline-5-one
108-26-9

3-methyl-2-pyrazoline-5-one

C

1-phenacetyl-3-methyl-pyrazolone-(5)

1-phenacetyl-3-methyl-pyrazolone-(5)

Conditions
ConditionsYield
at 20℃;
β-[(3-methyl-pyrazolone-(5)-carbonyl-(1))-amino]-crotonic acid ethyl ester

β-[(3-methyl-pyrazolone-(5)-carbonyl-(1))-amino]-crotonic acid ethyl ester

water
7732-18-5

water

A

ammonia
7664-41-7

ammonia

B

ethyl acetoacetate
141-97-9

ethyl acetoacetate

C

methylammonium carbonate
15719-64-9, 15719-76-3, 97762-63-5

methylammonium carbonate

D

3-methyl-2-pyrazoline-5-one
108-26-9

3-methyl-2-pyrazoline-5-one

2-(4,6-dimethyl-3-cyano-2-pyridinylthio)benzenediazonium nitrate

2-(4,6-dimethyl-3-cyano-2-pyridinylthio)benzenediazonium nitrate

3-methyl-2-pyrazoline-5-one
108-26-9

3-methyl-2-pyrazoline-5-one

4-[(4',6'-dimethyl-3'-cyano-2'-pyridinylthio)-2-phenylhydrazono]-5-methyl-2,4-dihydropyrazole-3-one

4-[(4',6'-dimethyl-3'-cyano-2'-pyridinylthio)-2-phenylhydrazono]-5-methyl-2,4-dihydropyrazole-3-one

Conditions
ConditionsYield
Stage #1: 2-(4,6-dimethyl-3-cyano-2-pyridinylthio)benzenediazonium nitrate; 3-methyl-2-pyrazoline-5-one for 0.0833333h; grinding;
Stage #2: With trimethylamine at 20℃; under 375.038 Torr; for 12h; Further stages.;
100%
α-bromoacetophenone
70-11-1

α-bromoacetophenone

3-methyl-2-pyrazoline-5-one
108-26-9

3-methyl-2-pyrazoline-5-one

(5-methyl-2H-pyrazol-3-yl) (2-oxo-2-phenylethyl) ether

(5-methyl-2H-pyrazol-3-yl) (2-oxo-2-phenylethyl) ether

Conditions
ConditionsYield
Stage #1: α-bromoacetophenone; 3-methyl-2-pyrazoline-5-one at 20℃; for 1h; ball-milling;
Stage #2: With sodium carbonate Further stages.;
100%
benzaldehyde
100-52-7

benzaldehyde

3-methyl-2-pyrazoline-5-one
108-26-9

3-methyl-2-pyrazoline-5-one

malononitrile
109-77-3

malononitrile

[(5-hydroxy-3-methyl-1H-pyrazol-4-yl)(phenyl)methyl]propanedinitrile

[(5-hydroxy-3-methyl-1H-pyrazol-4-yl)(phenyl)methyl]propanedinitrile

Conditions
ConditionsYield
In water at 60℃; for 0.25h; Green chemistry;100%
With ethanol; sodium acetate at 20℃; for 0.5h; Green chemistry;83%
m-bromobenzoic aldehyde
3132-99-8

m-bromobenzoic aldehyde

3-methyl-2-pyrazoline-5-one
108-26-9

3-methyl-2-pyrazoline-5-one

malononitrile
109-77-3

malononitrile

[(3-bromophenyl)(5-hydroxy-3-methyl-1H-pyrazol-4-yl)methyl]malononitrile
1032011-01-0

[(3-bromophenyl)(5-hydroxy-3-methyl-1H-pyrazol-4-yl)methyl]malononitrile

Conditions
ConditionsYield
With ethanol; sodium acetate at 20℃; for 1h; Green chemistry;99%
indole-2,3-dione
91-56-5

indole-2,3-dione

3-methyl-2-pyrazoline-5-one
108-26-9

3-methyl-2-pyrazoline-5-one

3-hydroxy-3-(3-hydroxy-5-methyl-1H-pyrazol-4-yl)indolin-2-one

3-hydroxy-3-(3-hydroxy-5-methyl-1H-pyrazol-4-yl)indolin-2-one

Conditions
ConditionsYield
With water at 20℃; for 0.166667h; Solvent; Green chemistry;99%
5-fluoro-1H-indole-2,3-dione
443-69-6

5-fluoro-1H-indole-2,3-dione

3-methyl-2-pyrazoline-5-one
108-26-9

3-methyl-2-pyrazoline-5-one

5-fluoro-3-hydroxy-3-(3-hydroxy-5-methyl-1H-pyrazol-4-yl)indolin-2-one

5-fluoro-3-hydroxy-3-(3-hydroxy-5-methyl-1H-pyrazol-4-yl)indolin-2-one

Conditions
ConditionsYield
With water at 20℃; for 0.166667h; Green chemistry;99%
5-chloroindole 2,3-dione
17630-76-1

5-chloroindole 2,3-dione

3-methyl-2-pyrazoline-5-one
108-26-9

3-methyl-2-pyrazoline-5-one

5-chloro-3-hydroxy-3-(3-hydroxy-5-methyl-1H-pyrazol-4-yl)indolin-2-one

5-chloro-3-hydroxy-3-(3-hydroxy-5-methyl-1H-pyrazol-4-yl)indolin-2-one

Conditions
ConditionsYield
With water at 20℃; for 0.166667h; Green chemistry;99%
5-iodoisatin
20780-76-1

5-iodoisatin

3-methyl-2-pyrazoline-5-one
108-26-9

3-methyl-2-pyrazoline-5-one

3-hydroxy-3-(3-hydroxy-5-methyl-1H-pyrazol-4-yl)-5-iodoindolin-2-one

3-hydroxy-3-(3-hydroxy-5-methyl-1H-pyrazol-4-yl)-5-iodoindolin-2-one

Conditions
ConditionsYield
With water at 20℃; for 0.166667h; Green chemistry;99%
5-nitroisatin
611-09-6

5-nitroisatin

3-methyl-2-pyrazoline-5-one
108-26-9

3-methyl-2-pyrazoline-5-one

3-hydroxy-3-(3-hydroxy-5-methyl-1H-pyrazol-4-yl)-5-nitroindolin-2-one

3-hydroxy-3-(3-hydroxy-5-methyl-1H-pyrazol-4-yl)-5-nitroindolin-2-one

Conditions
ConditionsYield
With water at 20℃; Green chemistry;99%
5-methoxyisatine
39755-95-8

5-methoxyisatine

3-methyl-2-pyrazoline-5-one
108-26-9

3-methyl-2-pyrazoline-5-one

3-hydroxy-3-(3-hydroxy-5-methyl-1H-pyrazol-4-yl)-5-methoxyindolin-2-one

3-hydroxy-3-(3-hydroxy-5-methyl-1H-pyrazol-4-yl)-5-methoxyindolin-2-one

Conditions
ConditionsYield
With water at 20℃; for 0.166667h; Green chemistry;99%
3-methyl-2-pyrazoline-5-one
108-26-9

3-methyl-2-pyrazoline-5-one

5-trifluoromethoxy-1H-indole-2,3-dione
169037-23-4

5-trifluoromethoxy-1H-indole-2,3-dione

3-hydroxy-3-(3-hydroxy-5-methyl-1H-pyrazol-4-yl)-5-(trifluoromethoxy)indolin-2-one

3-hydroxy-3-(3-hydroxy-5-methyl-1H-pyrazol-4-yl)-5-(trifluoromethoxy)indolin-2-one

Conditions
ConditionsYield
With water at 20℃; for 0.166667h; Green chemistry;99%
1-methyl-1H-indole-2,3-dione
2058-74-4

1-methyl-1H-indole-2,3-dione

3-methyl-2-pyrazoline-5-one
108-26-9

3-methyl-2-pyrazoline-5-one

3-hydroxy-3-(3-hydroxy-5-methyl-1H-pyrazol-4-yl)-1-methylindolin-2-one

3-hydroxy-3-(3-hydroxy-5-methyl-1H-pyrazol-4-yl)-1-methylindolin-2-one

Conditions
ConditionsYield
With water at 20℃; for 0.166667h; Green chemistry;99%
1-phenyl-indole-2,3-dione
723-89-7

1-phenyl-indole-2,3-dione

3-methyl-2-pyrazoline-5-one
108-26-9

3-methyl-2-pyrazoline-5-one

3-hydroxy-3-(3-hydroxy-5-methyl-1H-pyrazol-4-yl)-1-phenylindolin-2-one

3-hydroxy-3-(3-hydroxy-5-methyl-1H-pyrazol-4-yl)-1-phenylindolin-2-one

Conditions
ConditionsYield
With water at 20℃; for 0.166667h; Green chemistry;99%
4-chlorobenzaldehyde
104-88-1

4-chlorobenzaldehyde

3-methyl-2-pyrazoline-5-one
108-26-9

3-methyl-2-pyrazoline-5-one

malononitrile
109-77-3

malononitrile

6‐amino‐3‐methyl‐ 4‐(4‐chlorophenyl)‐1,4‐dihydropyrano[2,3‐c]pyrazole‐5‐carbonitrile
89607-39-6

6‐amino‐3‐methyl‐ 4‐(4‐chlorophenyl)‐1,4‐dihydropyrano[2,3‐c]pyrazole‐5‐carbonitrile

Conditions
ConditionsYield
With MgFeCrO4 In ethanol; water for 0.0833333h; Catalytic behavior; Solvent; Time; Reflux;98%
With H3PO4/Al2O3 In neat (no solvent) at 100℃; for 0.1h; Reagent/catalyst; Green chemistry;97%
With C8H19N2(1+)*HO(1-) In ethanol; water for 0.0833333h; Solvent; Microwave irradiation;95%
benzaldehyde
100-52-7

benzaldehyde

3-methyl-2-pyrazoline-5-one
108-26-9

3-methyl-2-pyrazoline-5-one

malononitrile
109-77-3

malononitrile

6-amino-1,4-dihydro-3-methyl-4-phenylpyrano[2,3-c]pyrazole-5-carbonitrile
81000-11-5

6-amino-1,4-dihydro-3-methyl-4-phenylpyrano[2,3-c]pyrazole-5-carbonitrile

Conditions
ConditionsYield
With sodium hydroxide In water at 100℃; for 1h; Reagent/catalyst; Temperature; Time; Solvent; Green chemistry;98%
Stage #1: benzaldehyde; malononitrile In ethanol; water at 20℃; for 0.25h; UV-irradiation; Green chemistry;
Stage #2: 3-methyl-2-pyrazoline-5-one In ethanol; water at 20℃; for 0.75h; UV-irradiation; Green chemistry;
98%
With H3PO4/Al2O3 In neat (no solvent) at 100℃; for 0.116667h; Catalytic behavior; Reagent/catalyst; Temperature; Green chemistry;97%
1-amino-9,10-dioxo-9,10-dihydro-anthracene-2-carbaldehyde
6363-87-7

1-amino-9,10-dioxo-9,10-dihydro-anthracene-2-carbaldehyde

3-methyl-2-pyrazoline-5-one
108-26-9

3-methyl-2-pyrazoline-5-one

1-amino-2-<(3-methyl-5-oxo-2-pyrazolin-4-ylidene)methyl>anthraquinone
107124-90-3

1-amino-2-<(3-methyl-5-oxo-2-pyrazolin-4-ylidene)methyl>anthraquinone

Conditions
ConditionsYield
With potassium hydroxide In ethanol for 2h; Heating;98%
4-chlorobenzaldehyde
104-88-1

4-chlorobenzaldehyde

3-methyl-2-pyrazoline-5-one
108-26-9

3-methyl-2-pyrazoline-5-one

4-((5-hydroxy-3-methyl-1H-pyrazol-4-yl)(4-chlorophenyl)-methyl)-3-methyl-1H-pyrazol–5–ol

4-((5-hydroxy-3-methyl-1H-pyrazol-4-yl)(4-chlorophenyl)-methyl)-3-methyl-1H-pyrazol–5–ol

Conditions
ConditionsYield
With phosphotungstic acid In ethanol for 0.25h; Reagent/catalyst; Temperature; Solvent; Time; Reflux; Green chemistry;98%
With Santa Barbara Amorphous modified with propylsulfonic acid groups In neat (no solvent) at 120℃; for 0.0666667h; Catalytic behavior; Solvent; Green chemistry;95%
With sodium dodecyl-sulfate In water for 1h; Heating;83.7%
In glycerol at 80℃; for 0.05h; Green chemistry;
5-chloroindole 2,3-dione
17630-76-1

5-chloroindole 2,3-dione

3-methyl-2-pyrazoline-5-one
108-26-9

3-methyl-2-pyrazoline-5-one

malononitrile
109-77-3

malononitrile

6'‑amino‑3'‑methyl‑2‑oxo‑1'H‑spiro[5‑chloro‑indoline‑3,4'‑pyrano[2,3‑c]pyrazole]‑5'‑carbonitrile
296800-64-1, 713129-95-4

6'‑amino‑3'‑methyl‑2‑oxo‑1'H‑spiro[5‑chloro‑indoline‑3,4'‑pyrano[2,3‑c]pyrazole]‑5'‑carbonitrile

Conditions
ConditionsYield
With bovine serum albumin In ethanol; water at 20℃; for 0.25h; Enzymatic reaction;98%
With N-Sulfonic acid modified poly(styrene-co-maleic anhydride) In ethanol for 0.416667h; Reflux; Green chemistry; regioselective reaction;97%
With potassium carbonate In water at 20℃; for 0.166667h;87.3%
4,7-dichloroisatin
18711-13-2

4,7-dichloroisatin

3-methyl-2-pyrazoline-5-one
108-26-9

3-methyl-2-pyrazoline-5-one

4,7-dichloro-3-hydroxy-3-(3-hydroxy-5-methyl-1H-pyrazol-4-yl)-indolin-2-one

4,7-dichloro-3-hydroxy-3-(3-hydroxy-5-methyl-1H-pyrazol-4-yl)-indolin-2-one

Conditions
ConditionsYield
With water at 20℃; for 0.166667h; Green chemistry;98%
4-methyl-benzaldehyde
104-87-0

4-methyl-benzaldehyde

3-methyl-2-pyrazoline-5-one
108-26-9

3-methyl-2-pyrazoline-5-one

4-((5-hydroxy-3-methyl-1H-pyrazol-4-yl)(p-tolyl)methyl)-3-methyl-1H-pyrazol-5-ol

4-((5-hydroxy-3-methyl-1H-pyrazol-4-yl)(p-tolyl)methyl)-3-methyl-1H-pyrazol-5-ol

Conditions
ConditionsYield
With 1,4-diazabicyclo[2.2.2]octane hydroacetate In water at 80℃; for 0.0833333h; Green chemistry;98%
With phosphotungstic acid In ethanol for 1h; Reflux; Green chemistry;96%
With Santa Barbara Amorphous modified with propylsulfonic acid groups In neat (no solvent) at 120℃; Green chemistry;87%
In glycerol at 80℃; for 0.0333333h; Green chemistry;
1,1,3-tricyano-2-amino-1-propene
868-54-2

1,1,3-tricyano-2-amino-1-propene

salicylaldehyde
90-02-8

salicylaldehyde

3-methyl-2-pyrazoline-5-one
108-26-9

3-methyl-2-pyrazoline-5-one

2,4-diamino-5-(5-hydroxy-3-methyl-1H-pyrazol-4-yl)-5H-chromeno[2,3-b]pyridine-3-carbonitrile

2,4-diamino-5-(5-hydroxy-3-methyl-1H-pyrazol-4-yl)-5H-chromeno[2,3-b]pyridine-3-carbonitrile

Conditions
ConditionsYield
With triethylamine In propan-1-ol at 98℃; for 1h; Solvent; Reagent/catalyst;98%
With triethylamine In propan-1-ol at 98℃; for 1h; Catalytic behavior; Reagent/catalyst; Solvent;98%
4-nitrobenzaldehdye
555-16-8

4-nitrobenzaldehdye

3-methyl-2-pyrazoline-5-one
108-26-9

3-methyl-2-pyrazoline-5-one

malononitrile
109-77-3

malononitrile

6‐amino‐3‐methyl‐4‐(4‐nitrophenyl)‐1,4‐dihydropyrano[2,3‐c]pyrazole‐5‐carbonitrile
89607-34-1

6‐amino‐3‐methyl‐4‐(4‐nitrophenyl)‐1,4‐dihydropyrano[2,3‐c]pyrazole‐5‐carbonitrile

Conditions
ConditionsYield
With H3PO4/Al2O3 In neat (no solvent) at 100℃; for 0.0833333h; Reagent/catalyst; Green chemistry;97%
With piperidine In ethanol at 20℃; for 0.166667h; Green chemistry;90%
In ethanol; water for 0.333333h; Reflux; Green chemistry;88%
4-nitrobenzaldehdye
555-16-8

4-nitrobenzaldehdye

3-methyl-2-pyrazoline-5-one
108-26-9

3-methyl-2-pyrazoline-5-one

malononitrile
109-77-3

malononitrile

6-amino-2,4-dihydro-4-(4-nitrophenyl)-3-methylpyrano[2,3-c]pyrazole-5-carbonitrile
89607-34-1, 879451-69-1

6-amino-2,4-dihydro-4-(4-nitrophenyl)-3-methylpyrano[2,3-c]pyrazole-5-carbonitrile

Conditions
ConditionsYield
With propylamine functionalized nanoporous silica In ethanol at 20℃; for 0.25h; Green chemistry;97%
With 2-carboxy-N,N-diethylethanaminium acetate In neat (no solvent) at 60℃; for 0.1h;93%
With 1-methyl-3-methylimidazol-3-ium dimethyl phosphate In ethanol; water for 1h; Reflux;93%
4-chlorobenzaldehyde
104-88-1

4-chlorobenzaldehyde

3-methyl-2-pyrazoline-5-one
108-26-9

3-methyl-2-pyrazoline-5-one

malononitrile
109-77-3

malononitrile

[(4-chlorophenyl)(5-hydroxy-3-methyl-1H-pyrazol-4-yl)methyl]malononitrile

[(4-chlorophenyl)(5-hydroxy-3-methyl-1H-pyrazol-4-yl)methyl]malononitrile

Conditions
ConditionsYield
With ethanol; sodium acetate at 20℃; for 1h; Time; Green chemistry;97%
2,4-dichlorobenzaldeyhde
874-42-0

2,4-dichlorobenzaldeyhde

3-methyl-2-pyrazoline-5-one
108-26-9

3-methyl-2-pyrazoline-5-one

malononitrile
109-77-3

malononitrile

6-amino-3-methyl-4-(2,4-dichlorophenyl)-1,4-dihydropyrano[2,3-c]pyrazole-5-carbonitrile
297162-27-7, 671771-00-9

6-amino-3-methyl-4-(2,4-dichlorophenyl)-1,4-dihydropyrano[2,3-c]pyrazole-5-carbonitrile

Conditions
ConditionsYield
With H3PO4/Al2O3 In neat (no solvent) at 100℃; for 0.0833333h; Reagent/catalyst; Green chemistry;97%
Stage #1: 2,4-dichlorobenzaldeyhde; malononitrile With triethylamine In ethanol at 80℃; for 0.0333333h;
Stage #2: 3-methyl-2-pyrazoline-5-one In ethanol at 80℃; for 0.25h;
8%
With C8H19N2(1+)*HO(1-) In water for 0.0833333h; Microwave irradiation;
In water at 20℃; for 2.5h; Green chemistry;
With aspirin In neat (no solvent) at 80℃; for 0.666667h; Green chemistry;
11H-Indeno[1,2-b]quinoxaline-11-one
6954-91-2

11H-Indeno[1,2-b]quinoxaline-11-one

3-methyl-2-pyrazoline-5-one
108-26-9

3-methyl-2-pyrazoline-5-one

malononitrile
109-77-3

malononitrile

3'-amino-7'-methyl-2-oxo-2H,5H'-spiro[(11H)-indeno(1',2'-b)quinoxalin-11,1'-pyrano[2,3-c]pyrazole]-2'-carbonite
1427302-77-9, 1449513-91-0

3'-amino-7'-methyl-2-oxo-2H,5H'-spiro[(11H)-indeno(1',2'-b)quinoxalin-11,1'-pyrano[2,3-c]pyrazole]-2'-carbonite

Conditions
ConditionsYield
With triethylamine In ethanol for 1h; Mechanism; Reflux;97%
pyridine-2-carbaldehyde
1121-60-4

pyridine-2-carbaldehyde

3-methyl-2-pyrazoline-5-one
108-26-9

3-methyl-2-pyrazoline-5-one

4,4'-(pyridin-2-ylmethylene)bis(3-methyl-1H-pyrazol-5-ol)

4,4'-(pyridin-2-ylmethylene)bis(3-methyl-1H-pyrazol-5-ol)

Conditions
ConditionsYield
With phosphotungstic acid In ethanol for 1h; Reflux; Green chemistry;97%

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