Ring-Construction/Stereoselective Functionalization Cascade: Total Synthesis of Pachastrissamine (Jaspine B) through Palladium-Catalyzed Bis-cyclization of Propargyl Chlorides and Carbonates
作者:Shinsuke Inuki、Yuji Yoshimitsu、Shinya Oishi、Nobutaka Fujii、Hiroaki Ohno
DOI:10.1021/jo100544v
日期:2010.6.4
Palladium(0)-catalyzed cyclization of bromoallenes, propargyl chlorides, and carbonates bearing hydroxy and benzamide groups as internal nucleophiles stereoselectively provides functionalized tetrahydrofuran. Cyclization reactivity is dependent on the relative configuration of the benzamide and leaving groups, and on the nature of the leaving groups. This bis-cyclization was used as the key step in
钯(0)催化的溴化丙二烯,炔丙基氯和带有羟基和苯甲酰胺基团的碳酸酯作为内部亲核试剂,立体选择性地提供官能化的四氢呋喃。环化反应性取决于苯甲酰胺和离去基团的相对构型以及离去基团的性质。该双环化被用作短时间内进行的帕奇司他胺的全合成的关键步骤,后者是一种具有生物活性的海洋天然产物。