Highly Efficient Formal Synthesis of Cephalotaxine, Using the Stevens Rearrangement−Acid Lactonization Sequence as A Key Transformation
作者:Mo-ran Sun、Hong-tao Lu、Yan-zhi Wang、Hua Yang、Hong-min Liu
DOI:10.1021/jo8025252
日期:2009.3.6
Cephalotaxine (1), the major alkaloid isolated from Cephalotaxus species, has attracted considerable attention due to the promising antitumor activity of several of its derivatives and its unique structural features. Herein we describe a highly efficient formal synthesis of 1 employing the [2,3]-Stevens rearrangement−acid lactonization sequence as a key transformation from readily available (3,4-d
头足紫杉碱(1)是从头足紫杉物种中分离的主要生物碱,由于其某些衍生物的抗肿瘤活性及其独特的结构特征而备受关注。在本文中,我们描述了一种高效的形式化合成方法1,该方法使用[2,3] -Stevens重排-酸内酯化序列作为从容易获得的(3,4-二甲氧基苯基)乙酸,脯氨酸甲酯和烯丙基溴的关键转化。