A process for preparing cis-olefins of the formula ##STR1## where R is alkyl or alkenyl and R.sup.1 is alkyl and alkenyl, both optionally substituted by hydroxy, carbalkoxy or acyloxy, which comprises an ylide solution of the compound R--CH.sub.2 --P.sup.+ (C.sub.6 H.sub.5).sub.3 Br.sup.- in hexaalkyl phosphoric acid triamide and adding an aldehyde of the formula R.sup.1 --CHO.
Synthesis of 1-Acyl-2-alkylcyclopropanecarboxylic Esters from 2-Alkenylphosphonium Salts
作者:D. Jacoby、J. P. Célérier、H. Petit、G. Lhommet
DOI:10.1055/s-1990-26858
日期:——
The one-pot reaction of allyltriphenylphosphonium bromide with the sodium salts of ß-keto esters leads to the formation of alkyl 1-acyl-2-alkylcyclopropanecarboxylates.