Treatment of either the verticillenes (3), (6), (13) or (14) with Lewis acids fails to produce the corresponding taxane carbon framework (2), and instead only products, e.g. (8), (9), (16), of rearrangement of the epoxide rings in the substrates are obtained.
                                    用
路易斯酸处理Verticillenes(3),(6),(13)或(14)均不能产生相应的
紫杉烷碳骨架(2),而只能生成例如(8),(9),(如图16)所示,获得了在衬底中
环氧化物环的重排。