A Synthesis of Pyrrolophenanthridone Alkaloids via Consecutive Directed Lithiation and Palladium-catalyzed Cross-coupling Reactions
作者:Masatomo Iwao、Hirokazu Takehara、Shigeru Obata、Mitsuaki Watanabe
DOI:10.3987/com-94-6777
日期:——
A short and convergent synthesis of pyrrolophenanthridone alkaloids, such as anhydrolycorin-7-one, oxoassoanine, hippadine, and pratosine, was developed by using directed lithiation and palladium-catalyzed cross-coupling as key reactions. Anhydrolycorin-7-one was converted to an antitumor alkaloid, kalbretorine, via directed lithiation and hydroxylation reactions.