An operationally simple and fully regiocontrolled formal total synthesis of the montanine-type Amaryllidaceae alkaloid (±)-pancracine
作者:Martin G. Banwell、Alison J. Edwards、Katrina A. Jolliffe、Michael Kemmler
DOI:10.1039/b102252k
日期:——
Michael-addition product 6, which is readily elaborated, using straightforward chemistry, to the 5,11-methanomorphanthridine 2, acquisition of which constitutes a formal total synthesis of the racemic modification of the montanine alkaloid pancracine (1).
β-硝基苯乙烯4与环己烷-1,3-二酮(5)在DBU的存在下,提供了迈克尔加成产物6,其通过简单的化学方法容易地被修饰为5,11-甲基吗啡啶2,其获得构成了褐煤碱生物碱的外消旋修饰的正式全合成。潘克拉辛(1)。