作者:Cristina Nieto-Oberhuber、Salomé López、M. Paz Muñoz、Eloísa Jiménez-Núñez、Elena Buñuel、Diego J. Cárdenas、Antonio M. Echavarren
DOI:10.1002/chem.200501089
日期:2006.2.8
Gold(I) complexes are the most active catalysts for the biscyclopropanation of dienynes to form tetracyclic compounds. PtII and ZnII are also able to promote the biscyclopropanation, although less efficiently. The configurations obtained in all cases with the use of gold(I) catalysts can be explained by the pathway proceeding through anti cyclopropyl gold carbenes. Similar intermediates are most probably
金(I)配合物是二烯双环丙烷化以形成四环化合物的最具活性的催化剂。尽管效率较低,PtII和ZnII也能够促进双环丙烷化。在所有情况下使用金(I)催化剂获得的构型都可以通过进行抗环丙基金碳烯的途径来解释。类似的中间体最有可能参与RuII和PtII催化的反应。已经发现了两种不同的环丙烷化途径。它们取决于环丙基金卡宾(反或同)的结构以及金属卡宾和烯烃的相对排列。