作者:Samuel Chackalamannil、Robert J. Davies、Yuguang Wang、Theodros Asberom、Darío Doller、Jesse Wong、Daria Leone、Andrew T. McPhail
DOI:10.1021/jo981983+
日期:1999.3.1
isolated from the bark of Australian magnolias, is a promising lead in Alzheimer's disease research due to its potent muscarinic receptor antagonist property. We have described here a highly efficient synthetic strategy that resulted in the total synthesis of himbacine (1) in about 10% overall yield and isohimbacine (1a), an unnatural isomer of himbacine, in 18% overall yield. The total synthesis of himbacine
Himbacine(1)是一种从澳大利亚木兰树皮中分离出来的复杂哌啶生物碱,由于其强大的毒蕈碱受体拮抗剂特性,在阿尔茨海默氏病研究中是有希望的领先者。我们在这里描述了一种高效的合成策略,该合成策略可完成总合成量约10%的hibacine(1)和总收率18%的异辛巴因(1a)(一种非天然的hebacine异构体)。最初,以分子内Diels-Alder反应为关键步骤,以生成中间体5的方式进行喜巴碱的全合成,然后与硝酮4进行[3 + 2]环加成,生成异恶唑烷衍生物3。甲基化,然后催化还原3 12'-羟基himbacine(20),脱水后得到异himbacine(1a)作为唯一产物。在另一种方法中,