An enantioselective total synthesis of (+)-picrasin B
作者:Kenji Kawada、Moonsun Kim、David S. Watt
DOI:10.1016/s0040-4039(01)93835-3
日期:1989.1
An enantioselective total synthesis of (+)-picrasinB (1) from the R-(-)-enantiomer of the Wieland-Miescherketone (4) employed an A-AB-ABC-ABCD sequence to assemble the tetracyclic skeleton and relied upon a free radical cyclization of an α-bromoacetal to an enone in order to introduce the D ring and a manganese(III) acetate oxidation of a tricyclic enone intermediate in order to introduce the C-11