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Simagchem Corporation

Welcome to Simagchem, your partner in China as a premier supply of bulk specialty chemicals for industry and life science. We introduce experienced quality product and exceptional JIT service with instant market intelligence in China to benefit our

High quality Pyrethrin supplier in China

Cas:121-29-9

Min.Order:0 Metric Ton

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Type:Manufacturers

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Xi'an Xszo Chem Co., Ltd.

1. Factory price and high quality must be guaranteed, base on 8 years of production and R&D experience2. Free samples will be provided,ensure specifications and quality are right for customer3. Customers will receive the most professional technical s

High Content Natural Extract PYRETHRIN HACCP manufacturer

Cas:121-29-9

Min.Order:1 Gram

FOB Price: $0.1

Type:Manufacturers

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Xi`an Eastling Biotech Co., Ltd.

PYRETHRIN 2 CAS: 121-29-9 Molecular Formula: C22H28O5 Home Product Category Chemical pesticide technical Insecticide 121-29-9 121-29-9 - Names and Identifiers Name PYRETHRIN 2 Synonyms ent7,543 PYRETHRIN 2 3b

Top Quality Natural Pyrethrins

Cas:121-29-9

Min.Order:1 Kilogram

FOB Price: $35.0 / 49.0

Type:Lab/Research institutions

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Dayang Chem (Hangzhou) Co.,Ltd.

Dayangchem's 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. DayangChem can provide different quantities

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

PYRETHRIN 2 CAS 121-29-9

Cas:121-29-9

Min.Order:1 Kilogram

FOB Price: $1.0 / 10.0

Type:Trading Company

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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

New production CAS 121-29-9 with best quality

Cas:121-29-9

Min.Order:1 Kilogram

FOB Price: $139.0 / 210.0

Type:Trading Company

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Hebei Sankai Chemical Technology Co., Ltd

1. Product advantages High purity, all above 98.5%, no impurities after dissolution We will test each batch to ensure quality OEM and private brand services designed for free Various cap colors available We can also provide MT1 peptide powd

PYRETHRIN 2CAS121-29-9

Cas:121-29-9

Min.Order:1 Kilogram

FOB Price: $20.0 / 30.0

Type:Trading Company

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Shanghai Upbio Tech Co.,Ltd

1.No Less 8 years exporting experience. Clients 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 Specialized

Qingdao Beluga Import and Export Co., LTD

pyrethrin CAS:121-29-9 Qingdao Belugas Import and Export Co., Ltd. is a scientific and technological company integrating research and development, production and trade of chemical intermediates, specializing in high quality organic intermediates, s

pyrethrin CAS:121-29-9

Cas:121-29-9

Min.Order:1 Gram

Negotiable

Type:Lab/Research institutions

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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

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

PYRETHRIN 2

Cas:121-29-9

Min.Order:0 Metric Ton

Negotiable

Type:Lab/Research institutions

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Xiamen Jenny Chemical Technology Co., Ltd.

GMP standard, high purity, competitive price, in stock 1. Quick Response: within 6 hours after receiving your email. 2. Quality Guarantee: All products are strictly tested by our QC, confirmed by QA, and approved by a third-party lab in China, USA,

PYRETHRIN2

Cas:121-29-9

Min.Order:1 Milligram

Negotiable

Type:Trading Company

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Kono Chem Co.,Ltd

Appearance:Solid powder Storage:Sealed,light and oxygen resistant Package:Foil bag or drum Application:Applied in dietary supplements,pharmaceutical or cosmeticeuticals Transportation:by sea or air Port:Beijing or Guangzhou Port

GIHI CHEMICALS CO.,LIMITED

Lower price, sample is available,SDS test documents are available,large stock in warehouseAppearance:White powder Storage:Sealed and preserved Package:200/Kilograms Application:Fine chemical intermediates, used as the main raw material for the synthe

PYRETHRIN 2

Cas:121-29-9

Min.Order:0

Negotiable

Type:Lab/Research institutions

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Sinoway Industrial Co., Ltd.

Why is SINOWAY:1) Specialized in pharmaceutical and healthcare industrial since 19872) ISO 9001:2015 & SGS audited supplier . 3) Accept various payment terms : T.T 30-60 days.4) We have warehouse in USA with quickly shipment .5) We can do different t

99% up by HPLC Pyrethrine 121-29-9

Cas:121-29-9

Min.Order:0

Negotiable

Type:Trading Company

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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 PYRETHRIN P32921 500mg

Cas:121-29-9

Min.Order:1 bottle

Negotiable

Type:Lab/Research institutions

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Antimex Chemical Limied

2-methyl-4-oxo-3-(penta-2,4-dienyl)cyclopent-2-enyl [1R-[1alpha[S*(Z)](3beta)-3-(3-methoxy-2-methyl-3-oxoprop-1-enyl)-2,2-dimethylcyclopropanecarboxylateAppearance:detailed in specifications Storage:Keep away of light, cool place Package:25kg/drum;20

Guangdong Juda Chemical Industrial Co.,Limited

Appearance:solid or liquid Storage:sealed in cool and dry place Package:As customer's requested Application:Pharma Intermediate Transportation:by courier/air/sea Port:Any port in China

PYRETHRIN 2 CAS No.121-29-9

Cas:121-29-9

Min.Order:0

Negotiable

Type:Trading Company

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Luyunjia Chemistry Xiamen Limited

Xiamen Luyunjia Trading Co.,Ltd Package:1kg/bag; 4575kg/drum, or as customer's request. Application:Xiamen Luyunjia Trading Co.,Ltd Transportation:DHL, EMS, FedEx, TNT, AIR, SEA Port:Beijing,Shanghai,Guangzhou ,China main port

Pyrethrum flowers slag powder

Cas:121-29-9

Min.Order:0

Negotiable

Type:Lab/Research institutions

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Hangzhou Fandachem Co.,Ltd

Cyclopropanecarboxylicacid, 3-[(1E)-3-methoxy-2-methyl-3-oxo-1-propen-1-yl]-2,2-dimethyl-,(1S)-2-methyl-4-oxo-3-(2Z)-2,4-pentadien-1-yl-2-cyclopenten-1-yl ester,(1R,3R)-Appearance:white crystalline powder Storage:Store in dry, dark and ventilated pla

Asure Biochem CO.,LTD.

*stable and better quality products*efficient and meticulous servicesAppearance:Powder Storage:Store in dry, cool and ventilated place Package:1kg/tin 5kg/tin 25kg/carton Application:Pharmaceutical raw materials, making injection powder oral agent Tr

PYRETHRIN 2

Cas:121-29-9

Min.Order:0

Negotiable

Type:Trading Company

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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:500mg Application:Pharma;Industry;Agricultural;chemical reaserch Transportation:by express or by sea Port:Any po

PYRETHRIN

Cas:121-29-9

Min.Order:0

Negotiable

Type:Trading Company

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shanghai Tauto Biotech Co., Ltd

Appearance:powder or crystal Storage:-20degree Package:10mg,20mg,1g or on request Application:For research use only, like HPLC, Cell Culture, Animal Experiment, High Throughout Screening, etc.. Transportation:room temperature

ZHEJIANG JIUZHOU CHEM CO.,LTD

factory?direct?saleAppearance:White powder Storage:Sealed and preserved Package:200/Kilograms Application:healing drugs Transportation:By sea Port:Shanghai/tianjin

PYRETHRIN 2

Cas:121-29-9

Min.Order:0

Negotiable

Type:Trading Company

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Changzhou Extraordinary Pharmatech co.,LTD

Changzhou Extraordinary Pharmatech co., LTD. As a leading chemical manufacturer and supplier in China.DAS authentication is passed.We can provide the popular precursor chemicals, we have our own strong R & D team, have our own laboratories and fa

Pyrethrin 2

Cas:121-29-9

Min.Order:1 Gram

Negotiable

Type:Lab/Research institutions

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Hebei youze Biotechnology Co.,Ltd

Our Advantage 1.Best quality with competitive price. 2.Quick shipping,delivery on time. 3.We have a pharmaceutical raw material production plant and a reagent R&D center. 4.Support multiple trading methods and payment.We support wire transfer

Manufacturer of Pyrethrin 2 at Factory Price CAS NO.121-29-9

Cas:121-29-9

Min.Order:1 Kilogram

FOB Price: $6.8 / 8.6

Type:Trading Company

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Jilin haofei import and export trade Co.,Ltd

Price, service, company and transport advantage: 1. Best service, place of origin China, high quality, and reasonable price. 2. It's customers' right to choose the package (EMS, DHL, FEDEX, UPS). 3. It's customers' right

Xiamen BaiFuchem Co.,Ltd

BaiFuChem is a Professional chemical raw material supplier in China, our main products include Biochemical , Pharma Intermediate and Organic chemical etc. BaiFuChem have wealth of products,experience , expertise and state-of-the-art

High quality Pyrethrin

Cas:121-29-9

Min.Order:1 Kilogram

Negotiable

Type:Other

inquiry

Nanjing Norris Pharm Technology Co., Ltd.

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

PYRETHRIN 2

Cas:121-29-9

Min.Order:0

Negotiable

Type:Lab/Research institutions

inquiry

Hangzhou Yierdechem Co. Ltd

With about ten years experiences in the field of pharmaceutical chemicals, Yierdechem has established solid business cooperation relationships with many large companys worldwide.As a leading supplier of API and pharmaceutical intermediates, holds its

Pyrethrine

Cas:121-29-9

Min.Order:0

Negotiable

Type:Other

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Synthetic route

C21H26O5

C21H26O5

diazomethyl-trimethyl-silane
18107-18-1

diazomethyl-trimethyl-silane

Pyrethrin II
121-29-9

Pyrethrin II

Conditions
ConditionsYield
With potassium carbonate In methanol; hexane; toluene at 20 - 25℃; for 16h; Inert atmosphere;46%
(1R)-2.2-dimethyl-3t-<2-methoxycarbonyl-cis-propenyl>-cyclopropane-carboxylic acid-(1r)-chloride

(1R)-2.2-dimethyl-3t-<2-methoxycarbonyl-cis-propenyl>-cyclopropane-carboxylic acid-(1r)-chloride

(+)-cis-pyrethrolone

(+)-cis-pyrethrolone

Pyrethrin II
121-29-9

Pyrethrin II

methyl (1R,3R)-3-formyl-2,2-dimethylcyclopropanecarboxylate
27335-33-7

methyl (1R,3R)-3-formyl-2,2-dimethylcyclopropanecarboxylate

Pyrethrin II
121-29-9

Pyrethrin II

Conditions
ConditionsYield
Multi-step reaction with 5 steps
1.1: pyrrolidine / 1 h / 60 °C
2.1: potassium hydroxide / water; methanol; 5,5-dimethyl-1,3-cyclohexadiene / 16 h / 20 - 25 °C / Inert atmosphere
3.1: 1-methyl-1H-imidazole; p-toluenesulfonyl chloride; N-ethyl-N,N-diisopropylamine / acetonitrile / 0.5 h / 0 - 5 °C / Inert atmosphere
3.2: 2 h / 20 - 25 °C / Inert atmosphere
4.1: sodium dihydrogenphosphate; 2-methyl-but-2-ene; sodium chlorite / water; tert-butyl alcohol / 5 h / 20 - 25 °C
5.1: potassium carbonate / hexane; toluene; methanol / 16 h / 20 - 25 °C / Inert atmosphere
View Scheme
(S)-(+)-4-hydroxy-3-methyl-2-(pent-4-en-2-ynyl)-2-cyclopenten-1-one

(S)-(+)-4-hydroxy-3-methyl-2-(pent-4-en-2-ynyl)-2-cyclopenten-1-one

Pyrethrin II
121-29-9

Pyrethrin II

Conditions
ConditionsYield
Multi-step reaction with 4 steps
1.1: hydrogenchloride; zinc / ethanol; water / 16 h / 75 - 80 °C / Inert atmosphere
2.1: 1-methyl-1H-imidazole; p-toluenesulfonyl chloride; N-ethyl-N,N-diisopropylamine / acetonitrile / 0.5 h / 0 - 5 °C / Inert atmosphere
2.2: 2 h / 20 - 25 °C / Inert atmosphere
3.1: sodium dihydrogenphosphate; 2-methyl-but-2-ene; sodium chlorite / water; tert-butyl alcohol / 5 h / 20 - 25 °C
4.1: potassium carbonate / hexane; toluene; methanol / 16 h / 20 - 25 °C / Inert atmosphere
View Scheme
(S)-(+)-pyrethrolone
487-67-2

(S)-(+)-pyrethrolone

Pyrethrin II
121-29-9

Pyrethrin II

Conditions
ConditionsYield
Multi-step reaction with 3 steps
1.1: 1-methyl-1H-imidazole; p-toluenesulfonyl chloride; N-ethyl-N,N-diisopropylamine / acetonitrile / 0.5 h / 0 - 5 °C / Inert atmosphere
1.2: 2 h / 20 - 25 °C / Inert atmosphere
2.1: sodium dihydrogenphosphate; 2-methyl-but-2-ene; sodium chlorite / water; tert-butyl alcohol / 5 h / 20 - 25 °C
3.1: potassium carbonate / hexane; toluene; methanol / 16 h / 20 - 25 °C / Inert atmosphere
View Scheme
Conditions
ConditionsYield
Multi-step reaction with 8 steps
1.1: potassium hydroxide / ethanol; water / 3 h
2.1: (S)-1-(1-Naphthyl)ethylamine / ethanol / 3 h / 20 °C
3.1: ozone / Acidic conditions
4.1: pyrrolidine / 1 h / 60 °C
5.1: potassium hydroxide / water; methanol; 5,5-dimethyl-1,3-cyclohexadiene / 16 h / 20 - 25 °C / Inert atmosphere
6.1: 1-methyl-1H-imidazole; p-toluenesulfonyl chloride; N-ethyl-N,N-diisopropylamine / acetonitrile / 0.5 h / 0 - 5 °C / Inert atmosphere
6.2: 2 h / 20 - 25 °C / Inert atmosphere
7.1: sodium dihydrogenphosphate; 2-methyl-but-2-ene; sodium chlorite / water; tert-butyl alcohol / 5 h / 20 - 25 °C
8.1: potassium carbonate / hexane; toluene; methanol / 16 h / 20 - 25 °C / Inert atmosphere
View Scheme
Conditions
ConditionsYield
Multi-step reaction with 7 steps
1.1: (S)-1-(1-Naphthyl)ethylamine / ethanol / 3 h / 20 °C
2.1: ozone / Acidic conditions
3.1: pyrrolidine / 1 h / 60 °C
4.1: potassium hydroxide / water; methanol; 5,5-dimethyl-1,3-cyclohexadiene / 16 h / 20 - 25 °C / Inert atmosphere
5.1: 1-methyl-1H-imidazole; p-toluenesulfonyl chloride; N-ethyl-N,N-diisopropylamine / acetonitrile / 0.5 h / 0 - 5 °C / Inert atmosphere
5.2: 2 h / 20 - 25 °C / Inert atmosphere
6.1: sodium dihydrogenphosphate; 2-methyl-but-2-ene; sodium chlorite / water; tert-butyl alcohol / 5 h / 20 - 25 °C
7.1: potassium carbonate / hexane; toluene; methanol / 16 h / 20 - 25 °C / Inert atmosphere
View Scheme
(1R,3R)-trans-chrysanthemic acid
4638-92-0

(1R,3R)-trans-chrysanthemic acid

Pyrethrin II
121-29-9

Pyrethrin II

Conditions
ConditionsYield
Multi-step reaction with 6 steps
1.1: ozone / Acidic conditions
2.1: pyrrolidine / 1 h / 60 °C
3.1: potassium hydroxide / water; methanol; 5,5-dimethyl-1,3-cyclohexadiene / 16 h / 20 - 25 °C / Inert atmosphere
4.1: 1-methyl-1H-imidazole; p-toluenesulfonyl chloride; N-ethyl-N,N-diisopropylamine / acetonitrile / 0.5 h / 0 - 5 °C / Inert atmosphere
4.2: 2 h / 20 - 25 °C / Inert atmosphere
5.1: sodium dihydrogenphosphate; 2-methyl-but-2-ene; sodium chlorite / water; tert-butyl alcohol / 5 h / 20 - 25 °C
6.1: potassium carbonate / hexane; toluene; methanol / 16 h / 20 - 25 °C / Inert atmosphere
View Scheme
(S)-4-hydroxy-3-methyl-2-(2-propynyl)-cyclopent-2-ene-1-one
77087-34-4

(S)-4-hydroxy-3-methyl-2-(2-propynyl)-cyclopent-2-ene-1-one

Pyrethrin II
121-29-9

Pyrethrin II

Conditions
ConditionsYield
Multi-step reaction with 5 steps
1.1: copper(l) iodide; tetrakis(triphenylphosphine) palladium(0); triethylamine / toluene / 16 h / 20 - 25 °C / Inert atmosphere
2.1: hydrogenchloride; zinc / ethanol; water / 16 h / 75 - 80 °C / Inert atmosphere
3.1: 1-methyl-1H-imidazole; p-toluenesulfonyl chloride; N-ethyl-N,N-diisopropylamine / acetonitrile / 0.5 h / 0 - 5 °C / Inert atmosphere
3.2: 2 h / 20 - 25 °C / Inert atmosphere
4.1: sodium dihydrogenphosphate; 2-methyl-but-2-ene; sodium chlorite / water; tert-butyl alcohol / 5 h / 20 - 25 °C
5.1: potassium carbonate / hexane; toluene; methanol / 16 h / 20 - 25 °C / Inert atmosphere
View Scheme
methyl (1R)-trans-2,2-dimethyl-3-[(E)-2-methyl-3-oxo-1-propenyl]cyclopropanecarboxylate
35867-05-1

methyl (1R)-trans-2,2-dimethyl-3-[(E)-2-methyl-3-oxo-1-propenyl]cyclopropanecarboxylate

Pyrethrin II
121-29-9

Pyrethrin II

Conditions
ConditionsYield
Multi-step reaction with 4 steps
1.1: potassium hydroxide / water; methanol; 5,5-dimethyl-1,3-cyclohexadiene / 16 h / 20 - 25 °C / Inert atmosphere
2.1: 1-methyl-1H-imidazole; p-toluenesulfonyl chloride; N-ethyl-N,N-diisopropylamine / acetonitrile / 0.5 h / 0 - 5 °C / Inert atmosphere
2.2: 2 h / 20 - 25 °C / Inert atmosphere
3.1: sodium dihydrogenphosphate; 2-methyl-but-2-ene; sodium chlorite / water; tert-butyl alcohol / 5 h / 20 - 25 °C
4.1: potassium carbonate / hexane; toluene; methanol / 16 h / 20 - 25 °C / Inert atmosphere
View Scheme
(1R,3R)-2,2-Dimethyl-3-((E)-2-methyl-3-oxoprop-1-en-1-yl)cyclopropane-1-carboxylic Acid

(1R,3R)-2,2-Dimethyl-3-((E)-2-methyl-3-oxoprop-1-en-1-yl)cyclopropane-1-carboxylic Acid

Pyrethrin II
121-29-9

Pyrethrin II

Conditions
ConditionsYield
Multi-step reaction with 3 steps
1.1: 1-methyl-1H-imidazole; p-toluenesulfonyl chloride; N-ethyl-N,N-diisopropylamine / acetonitrile / 0.5 h / 0 - 5 °C / Inert atmosphere
1.2: 2 h / 20 - 25 °C / Inert atmosphere
2.1: sodium dihydrogenphosphate; 2-methyl-but-2-ene; sodium chlorite / water; tert-butyl alcohol / 5 h / 20 - 25 °C
3.1: potassium carbonate / hexane; toluene; methanol / 16 h / 20 - 25 °C / Inert atmosphere
View Scheme
C21H26O4

C21H26O4

Pyrethrin II
121-29-9

Pyrethrin II

Conditions
ConditionsYield
Multi-step reaction with 2 steps
1: sodium dihydrogenphosphate; 2-methyl-but-2-ene; sodium chlorite / water; tert-butyl alcohol / 5 h / 20 - 25 °C
2: potassium carbonate / hexane; toluene; methanol / 16 h / 20 - 25 °C / Inert atmosphere
View Scheme
ethyl 2,2-dimethyl-3-(2-methylpropenyl)cyclopropanecarboxylate
97-41-6

ethyl 2,2-dimethyl-3-(2-methylpropenyl)cyclopropanecarboxylate

Pyrethrin II
121-29-9

Pyrethrin II

Conditions
ConditionsYield
Multi-step reaction with 9 steps
1.1: sodium hydride / mineral oil / 3 h / Inert atmosphere
2.1: potassium hydroxide / ethanol; water / 3 h
3.1: (S)-1-(1-Naphthyl)ethylamine / ethanol / 3 h / 20 °C
4.1: ozone / Acidic conditions
5.1: pyrrolidine / 1 h / 60 °C
6.1: potassium hydroxide / water; methanol; 5,5-dimethyl-1,3-cyclohexadiene / 16 h / 20 - 25 °C / Inert atmosphere
7.1: 1-methyl-1H-imidazole; p-toluenesulfonyl chloride; N-ethyl-N,N-diisopropylamine / acetonitrile / 0.5 h / 0 - 5 °C / Inert atmosphere
7.2: 2 h / 20 - 25 °C / Inert atmosphere
8.1: sodium dihydrogenphosphate; 2-methyl-but-2-ene; sodium chlorite / water; tert-butyl alcohol / 5 h / 20 - 25 °C
9.1: potassium carbonate / hexane; toluene; methanol / 16 h / 20 - 25 °C / Inert atmosphere
View Scheme
Pyrethrin II
121-29-9

Pyrethrin II

(1S)-2-methyl-4-oxo-3-pentylcyclopent-2-en-1-yl (1R,3R)-3-((E)-3-methoxy-2-methyl-3-oxoprop-1-en-1-yl)-2,2-dimethylcyclopropane-1-carboxylate

(1S)-2-methyl-4-oxo-3-pentylcyclopent-2-en-1-yl (1R,3R)-3-((E)-3-methoxy-2-methyl-3-oxoprop-1-en-1-yl)-2,2-dimethylcyclopropane-1-carboxylate

Conditions
ConditionsYield
With palladium 10% on activated carbon; hydrogen In tetrahydrofuran at 20℃; for 4h;97%
Pyrethrin II
121-29-9

Pyrethrin II

(1S,4R)-4-hydroxy-2-methyl-3-((2Z)-penta-2,4-dien-1-yl)cyclopent-2-en-1-yl (1R,3R)-3-((E)-3-methoxy-2-methyl-3-oxoprop-1-enyl)-2,2-dimethylcyclopropane-1-carboxylate

(1S,4R)-4-hydroxy-2-methyl-3-((2Z)-penta-2,4-dien-1-yl)cyclopent-2-en-1-yl (1R,3R)-3-((E)-3-methoxy-2-methyl-3-oxoprop-1-enyl)-2,2-dimethylcyclopropane-1-carboxylate

Conditions
ConditionsYield
With L-Selectride In tetrahydrofuran at 0℃; for 1h; Inert atmosphere; stereoselective reaction;20%
Pyrethrin II
121-29-9

Pyrethrin II

A

8',9'-epoxypyrethrin II

8',9'-epoxypyrethrin II

B

10',11'-epoxypyrethrin II

10',11'-epoxypyrethrin II

Conditions
ConditionsYield
With 3-chloro-benzenecarboperoxoic acid In dichloromethane for 1.5h;A 19%
B 7%
Pyrethrin II
121-29-9

Pyrethrin II

A

(S)-2-methyl-4-oxo-3-(penta-1,3-dien-1-yl)cyclopent-2-en-1-yl (1R,3R)-3-((E)-3-methoxy-2-methyl-3-oxoprop-1-en-1-yl)-2,2-dimethylcyclopropane-1-carboxylate

(S)-2-methyl-4-oxo-3-(penta-1,3-dien-1-yl)cyclopent-2-en-1-yl (1R,3R)-3-((E)-3-methoxy-2-methyl-3-oxoprop-1-en-1-yl)-2,2-dimethylcyclopropane-1-carboxylate

B

(1S)-2-methyl-4-oxo-3-((E)-penta-2,4-dien-1-yl)cyclopent-2-en-1-yl (1R,3R)-3-((E)-3-methoxy-2-methyl-3-oxoprop-1-en-1-yl)-2,2-dimethylcyclopropane-1-carboxylate

(1S)-2-methyl-4-oxo-3-((E)-penta-2,4-dien-1-yl)cyclopent-2-en-1-yl (1R,3R)-3-((E)-3-methoxy-2-methyl-3-oxoprop-1-en-1-yl)-2,2-dimethylcyclopropane-1-carboxylate

Conditions
ConditionsYield
With formic acid; palladium 10% on activated carbon In tetrahydrofuran for 5h; Inert atmosphere; Reflux;A 19%
B 14%
Pyrethrin II
121-29-9

Pyrethrin II

acetic acid
64-19-7

acetic acid

A

(1S,4R)-4-acetoxy-2-methyl-3-((2Z)-penta-2,4-dien-1-yl)cyclopent-2-en-1-yl (1R,3R)-3-((E)-3-methoxy-2-methyl-3-oxoprop-1-enyl)-2,2-dimethylcyclopropane-1-carboxylate

(1S,4R)-4-acetoxy-2-methyl-3-((2Z)-penta-2,4-dien-1-yl)cyclopent-2-en-1-yl (1R,3R)-3-((E)-3-methoxy-2-methyl-3-oxoprop-1-enyl)-2,2-dimethylcyclopropane-1-carboxylate

B

(1S,4S)-4-acetoxy-2-methyl-3-((2Z)-penta-2,4-dien-1-yl)cyclopent-2-en-1-yl (1R,3R)-3-((E)-3-methoxy-2-methyl-3-oxoprop-1-enyl)-2,2-dimethylcyclopropane-1-carboxylate

(1S,4S)-4-acetoxy-2-methyl-3-((2Z)-penta-2,4-dien-1-yl)cyclopent-2-en-1-yl (1R,3R)-3-((E)-3-methoxy-2-methyl-3-oxoprop-1-enyl)-2,2-dimethylcyclopropane-1-carboxylate

C

(1S,4R)-4-hydroxy-2-methyl-3-((2Z)-penta-2,4-dien-1-yl)cyclopent-2-en-1-yl (1R,3R)-3-((E)-3-methoxy-2-methyl-3-oxoprop-1-enyl)-2,2-dimethylcyclopropane-1-carboxylate

(1S,4R)-4-hydroxy-2-methyl-3-((2Z)-penta-2,4-dien-1-yl)cyclopent-2-en-1-yl (1R,3R)-3-((E)-3-methoxy-2-methyl-3-oxoprop-1-enyl)-2,2-dimethylcyclopropane-1-carboxylate

Conditions
ConditionsYield
Stage #1: Pyrethrin II With 9-bora-bicyclo[3.3.1]nonane In tetrahydrofuran for 5h; Inert atmosphere;
Stage #2: acetic acid In tetrahydrofuran for 1h; Inert atmosphere; Reflux;
A n/a
B n/a
C 19%
Pyrethrin II
121-29-9

Pyrethrin II

(-) trans-chrysanthemum dicarboxylic acid
72120-98-0

(-) trans-chrysanthemum dicarboxylic acid

Conditions
ConditionsYield
With potassium hydroxide In ethanol Hydrolysis;
Pyrethrin II
121-29-9

Pyrethrin II

A

7',8'-epoxypyrethrin II

7',8'-epoxypyrethrin II

B

7',8'-dihyroxypyrethrin II

7',8'-dihyroxypyrethrin II

Conditions
ConditionsYield
With 2,2'-azobis(isobutyronitrile) In benzene at 64℃; for 24h;A n/a
B 14 mg
Pyrethrin II
121-29-9

Pyrethrin II

8',9'-dihydroxypyrethrin II

8',9'-dihydroxypyrethrin II

Conditions
ConditionsYield
Multi-step reaction with 2 steps
1: 3-chloro-benzenecarboperoxoic acid / dichloromethane / 1.5 h
2: water; sulfuric acid / methanol / 1 h / 20 °C
View Scheme
Pyrethrin II
121-29-9

Pyrethrin II

A

(1S,4S)-4-hydroxy-2-methyl-3-((2Z)-penta-2,4-dien-1-yl)cyclopent-2-en-1-yl (1R,3R)-3-((E)-3-methoxy-2-methyl-3-oxoprop-1-enyl)-2,2-dimethylcyclopropane-1-carboxylate

(1S,4S)-4-hydroxy-2-methyl-3-((2Z)-penta-2,4-dien-1-yl)cyclopent-2-en-1-yl (1R,3R)-3-((E)-3-methoxy-2-methyl-3-oxoprop-1-enyl)-2,2-dimethylcyclopropane-1-carboxylate

B

(1S,4R)-4-hydroxy-2-methyl-3-((2Z)-penta-2,4-dien-1-yl)cyclopent-2-en-1-yl (1R,3R)-3-((E)-3-methoxy-2-methyl-3-oxoprop-1-enyl)-2,2-dimethylcyclopropane-1-carboxylate

(1S,4R)-4-hydroxy-2-methyl-3-((2Z)-penta-2,4-dien-1-yl)cyclopent-2-en-1-yl (1R,3R)-3-((E)-3-methoxy-2-methyl-3-oxoprop-1-enyl)-2,2-dimethylcyclopropane-1-carboxylate

Conditions
ConditionsYield
With sodium tetrahydroborate In tetrahydrofuran; methanol at 0℃; for 3h;A 40 mg
B 163 mg
Pyrethrin II
121-29-9

Pyrethrin II

(1S,4R)-4-acetoxy-2-methyl-3-((2Z)-penta-2,4-dien-1-yl)cyclopent-2-en-1-yl (1R,3R)-3-((E)-3-methoxy-2-methyl-3-oxoprop-1-enyl)-2,2-dimethylcyclopropane-1-carboxylate

(1S,4R)-4-acetoxy-2-methyl-3-((2Z)-penta-2,4-dien-1-yl)cyclopent-2-en-1-yl (1R,3R)-3-((E)-3-methoxy-2-methyl-3-oxoprop-1-enyl)-2,2-dimethylcyclopropane-1-carboxylate

Conditions
ConditionsYield
Multi-step reaction with 2 steps
1.1: 9-bora-bicyclo[3.3.1]nonane / tetrahydrofuran / 5 h / Inert atmosphere
1.2: 1 h / Inert atmosphere; Reflux
2.1: triethylamine / dichloromethane / 4.5 h / Inert atmosphere; Reflux
View Scheme
Multi-step reaction with 2 steps
1: L-Selectride / tetrahydrofuran / 1 h / 0 °C / Inert atmosphere
2: triethylamine / dichloromethane / 4.5 h / Inert atmosphere; Reflux
View Scheme
Multi-step reaction with 2 steps
1: sodium tetrahydroborate / tetrahydrofuran; methanol / 3 h / 0 °C
2: triethylamine / dichloromethane / 4.5 h / Inert atmosphere; Reflux
View Scheme
Pyrethrin II
121-29-9

Pyrethrin II

(1S,4S)-4-acetoxy-2-methyl-3-((2Z)-penta-2,4-dien-1-yl)cyclopent-2-en-1-yl (1R,3R)-3-((E)-3-methoxy-2-methyl-3-oxoprop-1-enyl)-2,2-dimethylcyclopropane-1-carboxylate

(1S,4S)-4-acetoxy-2-methyl-3-((2Z)-penta-2,4-dien-1-yl)cyclopent-2-en-1-yl (1R,3R)-3-((E)-3-methoxy-2-methyl-3-oxoprop-1-enyl)-2,2-dimethylcyclopropane-1-carboxylate

Conditions
ConditionsYield
Multi-step reaction with 2 steps
1: sodium tetrahydroborate / tetrahydrofuran; methanol / 3 h / 0 °C
2: triethylamine / dichloromethane / 4.5 h / Inert atmosphere; Reflux
View Scheme
Pyrethrin II
121-29-9

Pyrethrin II

A

(S)-2-methyl-4-oxo-3-((Z)-pent-2-en-1-yl)cyclopent-2-en-1-yl (1R,3R)-3-((E)-3-methoxy-2-methyl-3-oxoprop-1-en-1-yl)-2,2-dimethylcyclopropane-1-carboxylate
1172-63-0

(S)-2-methyl-4-oxo-3-((Z)-pent-2-en-1-yl)cyclopent-2-en-1-yl (1R,3R)-3-((E)-3-methoxy-2-methyl-3-oxoprop-1-en-1-yl)-2,2-dimethylcyclopropane-1-carboxylate

B

(1S)-2-methyl-4-oxo-3-pentylcyclopent-2-en-1-yl (1R,3R)-3-((E)-3-methoxy-2-methyl-3-oxoprop-1-en-1-yl)-2,2-dimethylcyclopropane-1-carboxylate

(1S)-2-methyl-4-oxo-3-pentylcyclopent-2-en-1-yl (1R,3R)-3-((E)-3-methoxy-2-methyl-3-oxoprop-1-en-1-yl)-2,2-dimethylcyclopropane-1-carboxylate

Conditions
ConditionsYield
With copper(ll) sulfate pentahydrate; hydrazine hydrate; acetic acid In tetrahydrofuranA 66 %Chromat.
B 26 %Chromat.

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