Reaction of organozinc reagents formed from α,α-dibromocarbonyl compounds and zinc with (3-phenylprop-2-enylidene)malonodinitriles and primary amides of 2-Cyano-5-phenylpenta-2,4-dienoic acid

Organozinc compounds formed from 1-aryl-2,2-dibromoalkanes, α,α-dibromopinacoline, and dialkyl dibromomalonates and zinc react with (3-phenylprop-2-enylidene)malonodinitriles and primary amides of 2-cyano-5-phenylpenta-2,4-dienoic acid to form 2-alkyl-2-aroyl-3-(phenylvinyl)cyclopropan-1,1-dicarboxylic acid dinitriles, N-substituted amides of 3-(phenylvinyl)-2-(2,2-dimethylpropanoyl)-1-cyanocyclopropan-1-carboxylic acids, and alkyl 3-R-6-(phenylvinyl)-2,4-dioxo-5-cyano-3-azabicyclo[3.1.0]-hexan-1-carboxylates as a single stereoisomer.