side chain together with ketone or lactone in B ring is reported. The epoxidation and regioselective lactonization of the diene 3 have been achieved in only one step using molecular oxygen and aldehyde. The influence of either an epoxide or a double bond at C2,C3 on the regioselectivity of the Baeyer-Villiger reaction is discussed.
报道了在A环和侧链具有环
氧功能的7种新的油菜素甾类类似物与在B环中的
酮或内
酯的合成。使用分子
氧和醛仅一步就可以实现二
烯3的环
氧化和区域选择性内
酯化。讨论了C2,C3处的
环氧化物或双键对Baeyer-Villiger反应的区域选择性的影响。