An effective strategy for the synthesis of cyclopentane-fused dihydropyrazolone-pyrrolidinediones via a PPh3-catalyzed sequential annulation reaction of maleimides and unsaturated pyrazolones has been developed.
通过PPh3催化的顺序环化反应,已经开发出一种合成
环戊烷-螺
氮酮-
吡咯烷二酮的有效策略,通过马来
酰亚胺和不饱和
吡唑酮的顺序环化反应实现。