Stereoselective synthesis of cembranolides via conjugate addition to cycloalkynones
作者:James A. Marshall、Stephen L. Crooks
DOI:10.1016/s0040-4039(00)95595-3
日期:——
cycloalkynone 8 yielded, after equilibration, a single (E)-enone 10 which was converted via acidic hydrolysis, oxidation, and reduction to the cis lactone 14. α-Methylenation afforded the natural cembranolide 16.
Synthesis of homochiral α-alkoxystannanes: stereospecific conversion to cembranolide precursors
作者:James A. Marshall、Wei Yi Gung
DOI:10.1016/s0040-4039(00)82010-9
日期:1988.1
Stannyl ketone 3 is reduced rapidly and with high stereoselectivity to the (S)-alcohol 4 by Noyori's (R)-(+)-BINAL-H reagent. The derived MOM ether aldehyde cyclizes upon treatment with BF3•Et2O affording the cis alcohol 8 as a single enantiomer.