Synthesis of the C21–C34-segment of the aplyronines using the dimer of methylketene
作者:Michael A Calter、Xin Guo
DOI:10.1016/s0040-4020(02)00723-8
日期:2002.8
This report describes a convergent synthesis of the C21–C34-segment of aplyronine. The starting point for both halves of this segment was the dimer of methylketene, readily available in either enantiomeric form by asymmetric catalysis. Diastereoselective reduction and functional group manipulation afforded the partners for a Wittig coupling reaction. The appropriate choice of oxygen protecting groups
该报告描述了邻苯丙氨酸的C 21 -C 34-片段的会聚合成。该段的两半的起点是甲基烯酮的二聚体,通过不对称催化可容易地以任何一种对映体形式获得。非对映选择性还原和官能团操纵为维蒂希偶联反应提供了伙伴。氧保护基团的适当选择允许的Wittig反应来进行,和烯烃,得到C中得到的氢化21 -C 34 -synthon。