Studies Aimed at the Total Synthesis of the Antitumor Antibiotic Cochleamycin A. An Enantioselective Biosynthesis-Based Pathway to the AB Bicyclic Core
作者:Jiyoung Chang、Leo A. Paquette
DOI:10.1021/ol0102592
日期:2002.1.1
[reaction: see text] A convergent, highly enantioselective synthesis of the fully functionalized AB sector of cochleamycin A is described. A pair of building blocks, crafted from L-malic and L-ascorbic acids, are conjoined in a manner that gives rise to an (E,Z,E)-1,6,8-nonatriene. On heating, the latter undergoes stereocontrolled intramolecular Diels-Alder cyclization via an endo transition state