作者:Peter S. Dragovich、Ru Zhou、Thomas J. Prins
DOI:10.1021/jo010712n
日期:2002.2.1
The eleven-step preparation of the bicyclic 2-pyridone dipeptide mimetic 1 [(3S)-6-(benzyloxycarbonylamino)-5-oxo-1,2,3,5-tetrahydroindolizine-3-carboxylic acid] in optically active form (60% ee) is described. Key steps in the synthesis of 1 include the osmium-catalyzed asymmetric dihydroxylation of olefin 13 [(6-but-3-enyl-2-methoxypyridin-3-yl)carbamic acid benzyl ester] and the intramolecular cyclization
光学活性形式的双环2-吡啶酮二肽模拟物1 [(3S)-6-(苄氧羰基氨基)-5-氧-1,2,3,5-四氢吲哚嗪-3-羧酸]的十一步制备(60说明了%ee)。合成1的关键步骤包括13的the催化的不对称二羟基化反应((6-丁-3-烯基-2-甲氧基吡啶-3-基)氨基甲酸苄酯)和受保护的二醇19 [[ 3'R)-[6- [4'-(叔丁基二甲基硅烷基甲氧基)-3'-羟基丁基] -2-甲氧基吡啶-3-基]氨基甲酸苄酯]得到吡啶鎓盐20 [(3S)-[3 -(叔丁基二甲基硅烷基甲氧基甲基)-5-甲氧基-2,3-二氢-1H-吲哚嗪-6-基]氨基甲酸苄基酯三氟甲磺酸盐]。还讨论了制备烯烃13的几种替代方法。