Total Synthesis of the Topopyrones: A New Class of Topoisomerase I Poisons
作者:Mark A. Elban、Sidney M. Hecht
DOI:10.1021/jo702487r
日期:2008.2.1
The topopyrones represent a new class of highly cytotoxic topoisomerase I poisons. Efficient total syntheses of all four naturally occurring members of this class have been accomplished. Key elements of the syntheses include Diels−Alder reactions employing two noveldienes and a titanium-mediated ortho-directed Friedel−Crafts acylation. Additionally, the syntheses of two chlorinated analogues accessible