PROCESS FOR PREPARING CIS-OLEFINS

摘要

A process for preparing cis-olefins of the formula where R is alkyl or alkenyl and R1 is alkyl and alkenyl, both optionally substituted by hydroxy, carbalkoxy or acyloxy, which comprises dissolving an alkali metal or alkaline earth metal in a hexaalkylphosphoric acid triamide, adding to the solution obtained a phosphonium salt of the formula I anda) adding to the reaction mixture obtained an aldehyde of the formula II orb) introducing oxygen into the reaction mixture if symmetrical olefins (R = R1) are desired.