Pyridine → HCID 86739796, compound

Participants

Reaction Steps

0.9 ml of pyridine and 2.1 g of dicyclohexylcarbodiimide were added to a solution of 2.9 g of the product of Step B in 40 ml of methylene chloride and the mixture was stirred for 15 minutes. A solution of 2.5 g of (S)α-cyano-3-phenoxy-benzyl alcohol in 15 ml of methylene chloride and then 25 mg of 4-dimethylamino-pyridine were added to the reaction mixture which was stirred for 2 hours and filtered. The filtrate was evaporated to dryness under reduced pressure and the residue was chromatographed over silica gel. Elution with a 9-1 cyclohexane-ethyl acetate mixture yielded 4.26 g of (S)α-cyano-3-phenoxy-benzyl (1R,cis) 2,2-dimethyl-3(Z)-[2-bromo-2-propoxycarbonyl-ethenyl]-cyclopropane-1-carboxylate melting at 64° C.

Provenance & Evidence