作者:Catalina Ferrer、Catelijne H. M. Amijs、Antonio M. Echavarren
DOI:10.1002/chem.200601324
日期:2007.2.2
Indoles react intramolecularly with alkynes in the presence of gold catalysts to give from six- to eight-membered-ring annulated compounds. The cationic Au(I) complex [Au(PC(6)H(4)(o-Ph)}(tBu)(2))(NCMe)]SbF(6) is the best catalyst for the formation of six- and seven-membered rings by 6-endo-dig, 6-exo-dig, and 7-exo-dig cyclizations. Indoloazocines are selectively obtained with AuCl(3) as catalyst
吲哚在金催化剂的存在下与炔烃分子内反应,得到六元至八元环的环状化合物。阳离子Au(I)络合物[Au(P C(6)H(4)(o-Ph)}(tBu)(2))(NCMe)] SbF(6)是形成六种化合物的最佳催化剂-和7元环,分别是6-endo-dig,6-exo-dig和7-exo-dig环化。Indoloazocines是用AuCl(3)作为催化剂在罕见的8-内切-挖掘过程中选择性获得的。在该方法中,由于初始的片段化反应,还形成了丙二烯或四环环状衍生物。吲哚与炔烃的分子间反应进行以形成3-链烯基化的中间体,其与第二当量的吲哚反应以产生双吲哚基衍生物。