As a leading manufacturer and supplier of chemicals in China, DayangChem not only supply popular chemicals, but also DayangChem's R&D center offer custom synthesis services. DayangChem can provide different quantities of custom synthesis ch
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inquiryJinlan Pharm-Drugs Technology Co.,Limited (with its export company Hangzhou Royall Import & Export Co.,Ltd.)is located in Hangzhou, Zhejiang Province. Neighboring Ningbo port, Shanghai port, Hangzhou Xiaoshan Int’l Airport and Shanghai P
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inquiry1. Product advantages ♦ High purity, all above 98.5%, no impurities after the dissolution ♦ We will test each batch to ensure quality ♦ OEM and private brand services designed for free ♦ Various cap colors available &diam
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inquiryProducts Name Esfenvalerate Molecular formula C25H22ClNO3 CAS No. 66230-04-4 Classification Acaricide, Insecticide Formulatio
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inquiryHello, dear friend! I'm Hansen and Allen from China. Welcome to my lookchem mall! The following is a brief introduction of our company's products and services. If you are interested in our products, please contact us by emai
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inquirysodium cyanide
S-(+)-2-(4-chlorophenyl)isovaleryl chloride
3-Phenoxybenzaldehyde
esfenvalerate
Conditions | Yield |
---|---|
With N-butyl-N,N-dimethyl-(α-phenyl)ethylammonium bromide In water; 1,2-dichloro-ethane at 0 - 5℃; for 2.25h; | 36% |
α-cyano-3-phenoxybenzyl S-(+)-2-(4-chlorophenyl)isovalerate
A
(R)-α-cyano-3-phenoxybenzyl (S)-2-(4-chlorophenyl)-3-methylbutyrate
B
esfenvalerate
Conditions | Yield |
---|---|
With ammonia In methanol at -19 - 17℃; for 17 - 260h; Purification / work up; Resolution of racemate; | A n/a B 23% |
Stage #1: α-cyano-3-phenoxybenzyl S-(+)-2-(4-chlorophenyl)isovalerate In n-heptane; toluene for 2h; Heating / reflux; Resolution of racemate; Stage #2: In methanol at -16 - 0℃; for 65 - 240h; Purification / work up; | |
iron rust In methanol at -5 - 12℃; for 30h; Purification / work up; Resolution of racemate; |
S-(+)-2-(4-chlorophenyl)isovaleryl chloride
(S)-m-phenoxybenzaldehyde cyanohydrin
esfenvalerate
Conditions | Yield |
---|---|
With pyridine |
S-(+)-2-(4-chlorophenyl)isovaleryl chloride
(S)-m-phenoxybenzaldehyde cyanohydrin
A
esfenvalerate
B
[R]-alpha-cyano-3-phenoxybenzyl [S]-2-(4-chlorophenyl)-2-isopropyl-acetate
Conditions | Yield |
---|---|
With pyridine In dichloromethane a) 0 deg C 1 h, b) r.t., overnight; Yield given. Title compound not separated from byproducts; |
2-hydroxy-2-(3-phenoxyphenyl)acetonitrile
S-(+)-2-(4-chlorophenyl)isovaleryl chloride
A
esfenvalerate
B
[R]-alpha-cyano-3-phenoxybenzyl [S]-2-(4-chlorophenyl)-2-isopropyl-acetate
Conditions | Yield |
---|---|
With pyridine In dichloromethane for 0.5h; Acylation; | A 495 mg B 645 mg |
2-(4-chlorophenyl)-3-methyl-(2SR)-butanoyl chloride
(S)-m-phenoxybenzaldehyde cyanohydrin
A
(R)-α-cyano-3-phenoxybenzyl (S)-2-(4-chlorophenyl)-3-methylbutyrate
B
esfenvalerate
Conditions | Yield |
---|---|
With pyridine In hexane; acetate buffer at 0℃; pH=4.5; Title compound not separated from byproducts; |
(S)-(+)-cyano(3-phenoxyphenyl)methyl butyrate
esfenvalerate
Conditions | Yield |
---|---|
Multi-step reaction with 2 steps 1: Pseudomonas cepacia lipase gelozyme; AcOH; 1-butanol / hexane / 3 h / 20 °C / Enzymatic reaction 2: pyridine / acetate buffer; hexane / 0 °C / pH 4.5 View Scheme |
2-(4-chlorophenyl)-3-methylbutyric acid
esfenvalerate
Conditions | Yield |
---|---|
Multi-step reaction with 3 steps 1: via (S)-(-)-α-methylbenzylamine salt 2: SOCl2; DMF / CHCl3 / 1 h / 60 °C 3: 495 mg / pyridine / CH2Cl2 / 0.5 h View Scheme |
S-isopropyl-4-chlorophenylacetic acid
esfenvalerate
Conditions | Yield |
---|---|
Multi-step reaction with 2 steps 1: SOCl2; DMF / CHCl3 / 1 h / 60 °C 2: 495 mg / pyridine / CH2Cl2 / 0.5 h View Scheme |
3-Phenoxybenzaldehyde
esfenvalerate
Conditions | Yield |
---|---|
Multi-step reaction with 2 steps 1: HCl / tetrahydrofuran; H2O / 0.5 h / 20 °C 2: 495 mg / pyridine / CH2Cl2 / 0.5 h View Scheme | |
Multi-step reaction with 3 steps 2: Candida cylindracea lipase / H2O / 23 h / 30 °C / pH 5 3: pyridine View Scheme | |
Multi-step reaction with 3 steps 2: 49 percent / Arthrobacter lipase / H2O / 23 h / 40 °C / further lipases and immobilized Arthrobacter lipase; effect of pH, temperature and (S)/(R) mixture of the acetate 3: pyridine View Scheme |
O-acetyl-(S)-2-hydroxy-2-(3-phenoxyphenyl)acetonitrile
esfenvalerate
Conditions | Yield |
---|---|
Multi-step reaction with 2 steps 1: 92 percent / ethanol / diisopropyl ether / 6 h / 25 °C / lipase from Pseudomonas cepacia (Amano) 2: pyridine / CH2Cl2 / a) 0 deg C 1 h, b) r.t., overnight View Scheme |
alpha-cyano-3-phenoxybenzyl acetate
esfenvalerate
Conditions | Yield |
---|---|
Multi-step reaction with 2 steps 1: Candida cylindracea lipase / H2O / 23 h / 30 °C / pH 5 2: pyridine View Scheme | |
Multi-step reaction with 2 steps 1: 49 percent / Arthrobacter lipase / H2O / 23 h / 40 °C / further lipases and immobilized Arthrobacter lipase; effect of pH, temperature and (S)/(R) mixture of the acetate 2: pyridine View Scheme |
2-hydroxy-2-(3-phenoxyphenyl)acetonitrile
(p-chlorophenyl)isopropylketene
esfenvalerate
(S)-m-phenoxybenzaldehyde cyanohydrin
esfenvalerate
Conditions | Yield |
---|---|
With pyridine In methanol; hexane; toluene |
esfenvalerate
A
1-allyl-4-chlorobenzene
B
4-chloro(ethylbenzene)
C
2-(4-Chlorophenyl)ethanol
D
2-(4-chlorophenyl)-3-methylbutyric acid
E
1-chloro-4-(1-methylprop-2-en-1-yl)benzene
F
3-phenoxybenzoic acid
G
2-(4-Chloro-phenyl)-propionic acid
H
3-Phenoxybenzaldehyde
I
para-Chlorobenzyl alcohol
Conditions | Yield |
---|---|
With dihydrogen peroxide In methanol; water at 25℃; for 4h; pH=10.95; |
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