Enantioselective modification of the Pomeranz–Fritsch–Bobbitt synthesis of tetrahydroisoquinoline alkaloids synthesis of (−)-salsolidine and (−)-carnegine
作者:Agata Głuszyńska、Maria D Rozwadowska
DOI:10.1016/s0957-4166(00)00196-8
日期:2000.6
(-)-Salsolidine 7 and (-)-carnegine 8 were prepared in 46 and 36% e.e., respectively, by enantioselective addition of methyllithium to the Pomeranz-Fritsch imine 13 in the presence of ligands 9 12, followed by acid-catalyzed cyclization and hydrogenolysis. (C) 2000 Elsevier Science Ltd, All rights reserved.
(-)-Salsolidine 7 和 (-)-carnegine 8 分别以 46% 和 36% 的对映体过量百分比(e.e.)制备而成。该过程通过在配体 9-12 存在下,将甲基锂选择性地添加到 Pomeranz-Fritsch 亚胺 13 中,随后经酸催化的环化和氢解反应完成。© 2000 Elsevier Science Ltd,版权所有。