Enantioselective Synthesis of a (1R,5R,9R)-2-Azabicyclo[3.3.1]nonane-9-carboxylic Acid with an Embedded Morphan Motif: A Multipurpose Product
作者:Narciso Garrido、Carlos Nieto、David Díez
DOI:10.1055/s-0032-1317950
日期:——
A convenient asymmetric synthesis of (1 R ,5 R ,9 R )-2-azabicyclo[3.3.1]nonane-9-carboxylic acid is described, starting from (2 E ,7 E )-dimethyl nonadienedioate. The route involves a stereoselective domino Michael–Dieckman process that furnishes a 1,2,3-trisubstituted cyclohexane derivative bearing three adjacent stereocenters with full stereochemical control. A subsequent chemoselective transformation
描述了从 (2 E ,7 E )-壬二酸二甲酯开始的 (1 R ,5 R ,9 R )-2-氮杂双环[3.3.1]壬烷-9-羧酸的方便的不对称合成。该路线涉及立体选择性多米诺迈克尔-迪克曼过程,该过程提供具有完全立体化学控制的三个相邻立体中心的 1,2,3-三取代环己烷衍生物。侧链酯基团之一的后续化学选择性转化允许有效的第二环化,导致吗啡基序。这种新型氨基酸在产生分子复杂性方面的多功能性是通过在均相中制备三肽来测试的。