We have successfully developed a novel and efficient phosphine-catalyzed sequential [2+3] and [3+2] annulation reaction of gamma-substituent allenoates to construct bicyclic[3, 3, 0]octene derivatives. The protocol uses readily available gamma-substituent allenoates as the starting materials, inexpensive PBu3 as the catalyst, and the corresponding products were obtained in good to excellent yields
我们已经成功开发了一种新型的,有效的膦催化的γ-取代的
脲基
甲酸酯连续的[2 + 3]和[3 + 2]环化反应,以构建双环[3,3,0]
辛烯衍
生物。该方案使用容易获得的γ-取代的
脲基
甲酸酯作为原料,廉价的PBu3作为催化剂,并且在温和的条件下以良好或优异的收率获得了相应的产物。