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
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
Cas:108-26-9
Min.Order:1
Negotiable
Type:Other
inquiryCangzhou 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
Cas:108-26-9
Min.Order:1 Kilogram
FOB Price: $5.0
Type:Manufacturers
inquiryDayangChem 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
Cas:108-26-9
Min.Order:1 Kilogram
FOB Price: $4.0
Type:Lab/Research institutions
inquiryOur 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
Cas:108-26-9
Min.Order:5 Kiloliter
FOB Price: $1.2 / 5.0
Type:Manufacturers
inquiryOur 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
Cas:108-26-9
Min.Order:1 Kilogram
FOB Price: $1.0 / 10.0
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inquiryWITH 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
Cas:108-26-9
Min.Order:1 Kilogram
FOB Price: $139.0 / 210.0
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inquiryProduct 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
Cas:108-26-9
Min.Order:1 Gram
Negotiable
Type:Lab/Research institutions
inquiry1.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
Cas:108-26-9
Min.Order:1 Gram
Negotiable
Type:Lab/Research institutions
inquiryHenan 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
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
Cas:108-26-9
Min.Order:0 Metric Ton
Negotiable
Type:Lab/Research institutions
inquiryJ&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
Cas:108-26-9
Min.Order:0
Negotiable
Type:Lab/Research institutions
inquiry3-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
Cas:108-26-9
Min.Order:1 Metric Ton
Negotiable
Type:Lab/Research institutions
inquiryWe 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
Appearance:95%+ Package:R&D,Pilot run Transportation:per client require Port:Express ,Air, Sea
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
Cas:108-26-9
Min.Order:1 Gram
Negotiable
Type:Lab/Research institutions
inquiryhigh 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
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
high purity,in stock Package:25kg/drum,or as per customers'demand Application:API,Pharmaceutical intermediates Transportation:air,sea,courier
Cas:108-26-9
Min.Order:0
Negotiable
Type:Lab/Research institutions
inquirystable supply&competitive price Storage:Available Package:25KG Or as client requirement Application:Important pharm intermediate Transportation:By air or By sea
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
Cas:108-26-9
Min.Order:1 bottle
Negotiable
Type:Lab/Research institutions
inquiryOur clients, like BASF,CHEMO,Brenntag,ASR,Evonik,Merck and etc.Appearance:COA Storage:in stock Application:MSDS/TDS
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
Cas:108-26-9
Min.Order:0
Negotiable
Type:Lab/Research institutions
inquiryTAIHO 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
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
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-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
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
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
Conditions | Yield |
---|---|
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% |
Conditions | Yield |
---|---|
With barium(II) hydroxide In water at 26℃; for 0.75h; Green chemistry; | 100% |
Conditions | Yield |
---|---|
With hydrazine hydrate In methanol at 50℃; for 3h; Temperature; Inert atmosphere; | 97.3% |
With hydrazine In ethanol |
N-acetoacetylphenylhydroxyloamine
A
N,N'-bis(isonicotinoyl)hydrazine
B
N-Phenylhydroxylamine
C
3-methyl-2-pyrazoline-5-one
D
azoxybenzene
Conditions | Yield |
---|---|
With isoniazid; triethylamine In chloroform for 24h; Heating; Further byproducts given; | A 39.5% B 32.7% C 90% D 22% |
N-acetoacetylphenylhydroxyloamine
isoniazid
A
N,N'-bis(isonicotinoyl)hydrazine
B
N-Phenylhydroxylamine
C
N-hydroxy-N-phenylisonicotinamide
D
3-methyl-2-pyrazoline-5-one
Conditions | Yield |
---|---|
triethylamine In chloroform for 24h; Heating; Further byproducts given; | A 39.5% B 32.7% C 23% D 90% |
isoniazid
A
N,N'-bis(isonicotinoyl)hydrazine
B
N-Phenylhydroxylamine
C
N-hydroxy-N-phenylisonicotinamide
D
3-methyl-2-pyrazoline-5-one
Conditions | Yield |
---|---|
With N,O-diacetylphenylhydroxylamine; triethylamine In chloroform for 24h; Heating; Further byproducts given; | A 39.5% B 32.7% C 23% D 90% |
Conditions | Yield |
---|---|
In ethanol Condensation; Cyclization; | 87% |
ethyl 2-acetyl-4,4,5,5,6,6,7,7,7-nonafluoro-3-oxoheptanoate
phenylhydrazine
A
2,2,3,3,4,4,5,5,5-Nonafluoro-pentanoic acid N'-phenyl-hydrazide
B
3-methyl-2-pyrazoline-5-one
Conditions | Yield |
---|---|
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
phenylhydrazine
A
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
Conditions | Yield |
---|---|
In diethyl ether at -30 - -25℃; for 1h; | A 79% B n/a |
ethyl acetoacetate
N-d-pseudoephedrinylacetic acid hydrazide
A
3-methyl-2-pyrazoline-5-one
B
(5S,6S)-4,5-dimethyl-6-phenyl-2-morpholone
Conditions | Yield |
---|---|
In isopropyl alcohol for 10h; Condensation; cyclization; elimination; Heating; | A n/a B 68% |
phenylhydrazine
ethyl 2-acetylacetoacetate
A
3-methyl-2-pyrazoline-5-one
B
1-acetyl-2-phenylhydrazine
Conditions | Yield |
---|---|
In diethyl ether at -30 - -25℃; | A n/a B 64% |
ethyl acetoacetate
N-l-ephedrinylacetic acid hydrazide
A
(5S,6R)-4,5-dimethyl-6-phenylmorpholin-2-one
B
3-methyl-2-pyrazoline-5-one
Conditions | Yield |
---|---|
In isopropyl alcohol for 10h; Condensation; cyclization; elimination; Heating; | A 62% B n/a |
3-methyl-2-pyrazoline-5-one
Conditions | Yield |
---|---|
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
phenylhydrazine
A
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
C
3-methyl-2-pyrazoline-5-one
Conditions | Yield |
---|---|
In ethanol at -30 - -25℃; for 1h; | A n/a B 27% C n/a |
ethyl 2-(1-adamantylcarbonyl)-3-oxobutanoate
A
3-(1-adamantyl)-4,5-dihydro-1H-pyrazol-5-one
B
adamantane-1-carbohydrazide
C
3-methyl-2-pyrazoline-5-one
Conditions | Yield |
---|---|
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
phenylhydrazine
A
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
C
3-methyl-2-pyrazoline-5-one
Conditions | Yield |
---|---|
In ethanol at -30 - -25℃; for 1h; | A n/a B 14% C n/a |
3-methyl-5-oxo-3-pyrazolin-1-carboxamide
3-methyl-2-pyrazoline-5-one
Conditions | Yield |
---|---|
geht allmaehlich in 3-Methyl-pyrazolon-(5) ueber; |
Conditions | Yield |
---|---|
at 120℃; |
S-ethyl acetothioacetate
A
1,2-dihydro-5-methyl-3H-pyrazol-3-one
B
5-Hydroxy-5-methyl-pyrazolidin-3-one
C
3-methyl-2-pyrazoline-5-one
D
ethanethiol
Conditions | Yield |
---|---|
With hydrazine In methanol; water at 30℃; not separated; | |
With hydrazine In methanol; water at 30℃; Rate constant; Kinetics; Mechanism; |
ethyl acetoacetate (Z)-semicarbazone
A
hydrazodicarboxamide
B
3-methyl-2-pyrazoline-5-one
Conditions | Yield |
---|---|
In water for 1h; Heating; | A 0.30 g B 0.12 g |
sulfuric acid
3-ethoxy-5-methyl-1H-pyrazole
3-methyl-2-pyrazoline-5-one
Conditions | Yield |
---|---|
at 140 - 150℃; |
3-methyl-5-oxo-3-pyrazolin-1-carboxamide
water
3-methyl-2-pyrazoline-5-one
2-[amino(thioxo)methyl]-5-methyl-2,3-dihydro-1H-3-pyrazolone
water
3-methyl-2-pyrazoline-5-one
water
ethyl acetoacetate
hydrazine hydrate
3-methyl-2-pyrazoline-5-one
2-[amino(thioxo)methyl]-5-methyl-2,3-dihydro-1H-3-pyrazolone
3-methyl-2-pyrazoline-5-one
2-[amino(thioxo)methyl]-5-methyl-2,3-dihydro-1H-3-pyrazolone
3-methyl-2-pyrazoline-5-one
Conditions | Yield |
---|---|
at 120℃; im Druckrohr; |
piperidine
ethyl acetoacetate
2-phenylacetylhydrazine
A
1,2-di(phenylacetyl)hydrazine
B
3-methyl-2-pyrazoline-5-one
Conditions | Yield |
---|---|
at 20℃; |
water
A
ammonia
B
ethyl acetoacetate
C
methylammonium carbonate
D
3-methyl-2-pyrazoline-5-one
3-methyl-2-pyrazoline-5-one
Conditions | Yield |
---|---|
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% |
Conditions | Yield |
---|---|
Stage #1: α-bromoacetophenone; 3-methyl-2-pyrazoline-5-one at 20℃; for 1h; ball-milling; Stage #2: With sodium carbonate Further stages.; | 100% |
Conditions | Yield |
---|---|
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
3-methyl-2-pyrazoline-5-one
malononitrile
[(3-bromophenyl)(5-hydroxy-3-methyl-1H-pyrazol-4-yl)methyl]malononitrile
Conditions | Yield |
---|---|
With ethanol; sodium acetate at 20℃; for 1h; Green chemistry; | 99% |
Conditions | Yield |
---|---|
With water at 20℃; for 0.166667h; Solvent; Green chemistry; | 99% |
Conditions | Yield |
---|---|
With water at 20℃; for 0.166667h; Green chemistry; | 99% |
5-chloroindole 2,3-dione
3-methyl-2-pyrazoline-5-one
Conditions | Yield |
---|---|
With water at 20℃; for 0.166667h; Green chemistry; | 99% |
5-iodoisatin
3-methyl-2-pyrazoline-5-one
Conditions | Yield |
---|---|
With water at 20℃; for 0.166667h; Green chemistry; | 99% |
Conditions | Yield |
---|---|
With water at 20℃; Green chemistry; | 99% |
5-methoxyisatine
3-methyl-2-pyrazoline-5-one
Conditions | Yield |
---|---|
With water at 20℃; for 0.166667h; Green chemistry; | 99% |
3-methyl-2-pyrazoline-5-one
5-trifluoromethoxy-1H-indole-2,3-dione
Conditions | Yield |
---|---|
With water at 20℃; for 0.166667h; Green chemistry; | 99% |
Conditions | Yield |
---|---|
With water at 20℃; for 0.166667h; Green chemistry; | 99% |
Conditions | Yield |
---|---|
With water at 20℃; for 0.166667h; Green chemistry; | 99% |
4-chlorobenzaldehyde
3-methyl-2-pyrazoline-5-one
malononitrile
6‐amino‐3‐methyl‐ 4‐(4‐chlorophenyl)‐1,4‐dihydropyrano[2,3‐c]pyrazole‐5‐carbonitrile
Conditions | Yield |
---|---|
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
3-methyl-2-pyrazoline-5-one
malononitrile
6-amino-1,4-dihydro-3-methyl-4-phenylpyrano[2,3-c]pyrazole-5-carbonitrile
Conditions | Yield |
---|---|
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
3-methyl-2-pyrazoline-5-one
1-amino-2-<(3-methyl-5-oxo-2-pyrazolin-4-ylidene)methyl>anthraquinone
Conditions | Yield |
---|---|
With potassium hydroxide In ethanol for 2h; Heating; | 98% |
Conditions | Yield |
---|---|
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
3-methyl-2-pyrazoline-5-one
malononitrile
6'‑amino‑3'‑methyl‑2‑oxo‑1'H‑spiro[5‑chloro‑indoline‑3,4'‑pyrano[2,3‑c]pyrazole]‑5'‑carbonitrile
Conditions | Yield |
---|---|
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
3-methyl-2-pyrazoline-5-one
Conditions | Yield |
---|---|
With water at 20℃; for 0.166667h; Green chemistry; | 98% |
Conditions | Yield |
---|---|
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
salicylaldehyde
3-methyl-2-pyrazoline-5-one
Conditions | Yield |
---|---|
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
3-methyl-2-pyrazoline-5-one
malononitrile
6‐amino‐3‐methyl‐4‐(4‐nitrophenyl)‐1,4‐dihydropyrano[2,3‐c]pyrazole‐5‐carbonitrile
Conditions | Yield |
---|---|
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
3-methyl-2-pyrazoline-5-one
malononitrile
6-amino-2,4-dihydro-4-(4-nitrophenyl)-3-methylpyrano[2,3-c]pyrazole-5-carbonitrile
Conditions | Yield |
---|---|
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% |
Conditions | Yield |
---|---|
With ethanol; sodium acetate at 20℃; for 1h; Time; Green chemistry; | 97% |
2,4-dichlorobenzaldeyhde
3-methyl-2-pyrazoline-5-one
malononitrile
6-amino-3-methyl-4-(2,4-dichlorophenyl)-1,4-dihydropyrano[2,3-c]pyrazole-5-carbonitrile
Conditions | Yield |
---|---|
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
3-methyl-2-pyrazoline-5-one
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
Conditions | Yield |
---|---|
With triethylamine In ethanol for 1h; Mechanism; Reflux; | 97% |
Conditions | Yield |
---|---|
With phosphotungstic acid In ethanol for 1h; Reflux; Green chemistry; | 97% |
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