反应详情

温度

20 °C

0.9 ml of cyclopropanol were added to a mixture of 5.5 g of (S)α-cyano-3-phenoxy-benzyl(1R,cis)2,2-dimethyl-3-[Z-2-carboxy-ethenyl]-cyclopropane-carboxylate in 26 ml of methylene chloride and 1 g of 4-dimethylamino-pyridine and 3 g of dicyclohexylcarbodiimide were added thereto at 0° C. The mixture was stirred at 20° C. for 90 minutes and was filtered. The filtrate was evaporated to dryness under reduced pressure and the residue was chromatographed over silica gel. Elution with an 85-15 cyclohexane-ethyl acetate mixture yielded 3.6 g of (S)α-cyano-3-phenoxy-benzyl(1R,cis)2,2-dimethyl-3-[Z-2-(cyclopropyloxycarbonyl)-ethenyl]-cyclopropane-carboxylate melting at 62° C.

1. additionwere added
2. customat 0° C
3. filtrationwas filtered
4. customThe filtrate was evaporated to dryness under reduced pressure
5. customthe residue was chromatographed over silica gel
6. washElution with an 85-15 cyclohexane-ethyl acetate mixture