Synthesis of (E)-1-Propenyl Ketones from Carboxylic Esters and Carboxamides by Use of Mixed Organolithium-Magnesium Reagents. Synthesis of ?-Damascone, ?-Damascone, and ?-Damascenone
作者:Charles Fehr、Jos� Galindo
DOI:10.1002/hlca.19860690127
日期:1986.2.5
The novel reagents formed by combination of allylmagnesium chloride and a strong non-nucleophilic lithium base (LiNR2) convert non- or slowly enolizable carboxylic esters or carboxamides into 2-propenyl ketones which are protected from further reaction by their in situ conversion into enolates. This modified Grignardreaction is applied to efficient syntheses of α-damascone, β-damascone, β-damascenone