Reaction of Allylic Phosphoranes with Iron Porphyrin Carbenoids: Efficient, Selective, and Catalytic Intermolecular Formal Carbenoid Insertion into Olefinic C−H Bonds
作者:Sunewang R. Wang、Chun-Yin Zhu、Xiu-Li Sun、Yong Tang
DOI:10.1021/ja8097959
日期:2009.4.1
A highly efficient, selective, and catalytic intermolecular formal carbenoid insertion reaction into olefinic C-H bonds of allylic phosphoranes is described. This novel insertion reaction proved to proceed via a catalytic cyclopropanation of allylic phosphoranes with diazoacetate, followed by ring opening of the resulting cyclopropane ylide. On the basis of this observation, a facile synthetic method
描述了一种高效、选择性和催化的分子间甲醛插入反应到烯丙基正膦的烯烃 CH 键中。这种新的插入反应证明是通过烯丙基正膦与重氮乙酸酯的催化环丙烷化反应进行的,然后是所得环丙烷叶立德的开环。在此观察的基础上,开发了一种简便的合成方法,通过三丁基膦衍生的盐 11 与 MDA 和醛在温和条件下的一锅反应生成具有高立体选择性的 1,1,4-三取代 1,3-丁二烯。