反应详情

温度

20 °C

A solution of 0.25 ml of 1-chloro-N,N, 2-trimethyl-propenylamine, 7.5 ml of methylene chloride and 1.5 ml of tert.-butanol was added to a solution of 0.5 g of (S)α-cyano-3-phenoxy-benzyl (1R,cis,Z) 2,2-dimethyl-3-[3-oxo-3-hydroxy -1-propenyl]-cyclopropane-carboxylate in 7.5 ml of methylene chloride and the mixtrue was stirred at 20° C. for 48 hours. The mixture was extracted with methylene chloride and the organic phase was washed with water and evaporated to dryness under reduced pressure. The residue was chromatographed over silica gel and was eluted with an 8-2 hexane-ether mixture to obtain 0.43 g of (S)α-cyano-3-phenoxy-benzyl (1R,cis,Z) 2,2-dimethyl-3-[3-oxo-3-chloro-1-propenyl]-cyclopropane-carboxylate melting at 86° C.

1. extractionThe mixture was extracted with methylene chloride
2. washthe organic phase was washed with water
3. customevaporated to dryness under reduced pressure
4. customThe residue was chromatographed over silica gel
5. washwas eluted with an 8-2 hexane-ether mixture