Stereoselective synthesis of the fully functionalized core fragment of terpentecin
作者:Taotao Ling、Fatima Rivas、Emmanuel A. Theodorakis
DOI:10.1016/s0040-4039(02)02314-6
日期:2002.12
presented. The five contiguous asymmetric centers of 4 were prepared from enone 8 via a sequence of steps highlighted by: oxygenation of the C6 center by epoxidation of enone 18, methylenation of the C8 carbonyl group of 20 by means of the Peterson olefination, stereoselective construction of the C8 center of 21 using homogeneous catalytic hydrogenation and stereoselective oxygenation of the C7 center.
提出了terpentecin核心片段4的立体选择性合成。的5个连续的不对称中心4从烯酮制备8通过由突出步骤的序列:由烯酮的环氧化的C6中心的氧合18,的C8羰基的亚甲基化20由Peterson烯化手段,立体选择性施工C8中心的21位采用均相催化加氢和C7中心的立体选择性加氧。