Synthesis of Benzomorphan Analogues by Intramolecular Buchwald–Hartwig Cyclization
作者:Anton S. Khartulyari、Martin E. Maier
DOI:10.1002/ejoc.200600688
日期:2007.1
important class of benzomorphans is described. The key bond formation is based on an intramolecular Buchwald–Hartwig enolate arylation reaction. Thus, alkylation of piperidones with ortho-bromobenzyl bromides provides the necessary substrates. In the presence of a palladium catalyst, a sterically hindered phosphane ligand, and a base, carbon–carbon bond formation to tricyclic benzomorphan derivatives takes
描述了一种针对重要苯并吗啡类的新策略。关键键的形成基于分子内 Buchwald-Hartwig 烯醇芳基化反应。因此,哌啶酮与邻溴苄基溴的烷基化提供了必要的底物。在钯催化剂、位阻磷烷配体和碱的存在下,三环苯并吗喃衍生物发生碳-碳键形成。除去N-保护基后,衍生反应是可能的。(© Wiley-VCH Verlag GmbH & Co. KGaA, 69451 Weinheim, Germany, 2007)