First Diastereoselective Synthesis of (−)-Methyl Thyrsiflorin A, (−)-Methyl Thyrsiflorin B Acetate, and (−)-Thyrsiflorin C
作者:Manuel Arnó、Miguel A. González、M. Luisa Marín、Ramón J. Zaragozá
DOI:10.1021/jo991561f
日期:2000.2.1
An efficient procedure for the synthesis of scopadulan diterpenes, using (+)-podocarp-8(14)-en-13-one 13 as starting material, is reported. This procedure has been used for the diastereoselective synthesis of (-)-methyl thyrsiflorin A (8), (-)-methyl thyrsiflorin B acetate (9), and (-)-thyrsiflorin C (7). Key steps in our strategy are the intramolecular cyclopropanation of diazoketone 19 and the regioselective
报道了使用(+)-罗汉松-8(14)-en-13-one 13作为起始原料合成可可杜兰二萜的有效方法。此程序已用于(-)-甲基酪氨三酸A(8),乙酸(-)-甲基酪氨二酸B(9)和(-)-酪氨三酸C(7)的非对映选择性合成。我们策略中的关键步骤是重氮酮19的分子内环丙烷化和环丙烷环的区域选择性裂解。