Development of a Divergent Synthetic Route to the Erythrina Alkaloids: Asymmetric Syntheses of 8-Oxo-erythrinine, Crystamidine, 8-Oxo-erythraline, and Erythraline
作者:Hirotatsu Umihara、Tomomi Yoshino、Jun Shimokawa、Masato Kitamura、Tohru Fukuyama
DOI:10.1002/anie.201602650
日期:2016.6.6
developed. Inspired by a proposed biosynthetic mechanism, the medium‐sized chiral biaryl lactam was asymmetrically transformed into the common core A–D rings by a stereospecific singlet oxygen oxidation of the phenol moiety, followed by a transannular aza‐Michael reaction to the dienone functionality. The late‐stage manipulation of the oxidation and oxygenation states of the functional groups on the peripheral
已经开发出针对赤藓生物碱的通用合成方法。受拟议的生物合成机制的启发,中等尺寸的手性联芳基内酰胺通过酚部分的立体有择单线态氧氧化,然后通过环戊二氮-迈克尔对二烯酮官能团的反应,不对称地转化为常见的A-D环。外围部分官能团的氧化和氧化状态的后期操作使赤藓生物碱的柔性合成成为可能。