Steric and electronic requirements of amide and ester groups in benzylidenemalonates

Article abstract of DOI:10.1016/0040-4020(95)00368-I

Stereoisomeric benzylidinemalonates have been synthesised. In the case of N-(2-ethoxycarbonyl-3-phenylpropenoyl)-2-oxazolidinone, both E- and Z-isomers could be obtained, but the Z-isomer isomerised (> 95%) to the E-isomer in the presence of catalytic amo