Stereoselective aldol condensations induced by a thermolabile group.
作者:R Bloch、L Gilbert
DOI:10.1016/s0040-4039(00)84836-4
日期:1986.1
Diastereoselective aldolcondensations between exo, endo and 2-methyl endo bicyclo[2.2.1]-5-hepten-2-yl ethyl ketones and aldehydes are achieved via the ketones Z-lithium enolates prepared with lithium hexamethyldisilazide. The aldols thus obtained give rise by a retro Diels-Alder reaction to α-methyl-β-siloxy-α′-ethylenic ketones of potential value for polyhydroxylated natural product synthesis.