Alkylation d'acetates de cyclenols fonctionnels (5 et 6 chainons) par les reactifs de grignard et les enolates lithiens catalysee (ou non) par les sels de cuivre (I). Synthese rapide de la (±) mitsugashiwalactone
作者:H. Amri、J. Villieras
DOI:10.1016/s0040-4039(00)96769-8
日期:1987.1
Substitution of 1-ethoxycarbonyl n-hydroxycycloalkenes acetates and silyl ethers (n = 5, 6) by GRIGNARDreagents in the presence of cuprous salt as a catalyst or lithium ester enolates (without catalyst) gives rise to various 1-carbethoxy alkylcycloalkenes. It is applied to a new short stereoselective synthesis of (±) Mitsugashiwalactone (6 steps - 27 % global yield) from a succinaldehyde precursor