A CONCISE PREPARATION OF YUEHCHUKENE AND ITS ANALOGUES

摘要

The palladium catalyzed carbonylative cross-coupling reaction of indolylborates(2)with vinyl triflates (3)afforded indol-2-yl ketones (4),which were subsequently converted to hexahydroindeno[2,1-b]indoles(5)with the aid of an acid.This protocol was well adapted for the total synthesis of yuehchukene.