Gold(I)-Catalyzed Cycloisomerization–Dimerization Cascade of Benzene-Tethered 1,6-Enynes
作者:Mónica Álvarez-Pérez、María Frutos、Alma Viso、Roberto Fernández de la Pradilla、María C. de la Torre、Miguel A. Sierra、Heinz Gornitzka、Catherine Hemmert
DOI:10.1021/acs.joc.7b01273
日期:2017.7.21
An unprecedented stereoselective domino reaction of 1,6-enynes with an aryl ring at C3–C4 in the presence of gold(I) catalysts at low temperature is described. This process involves a novel 5-exo-dig cycloisomerization–dimerization sequence to afford formal Diels–Alder adducts that undergo a smooth gold-catalyzed double bond migration at room temperature. In addition, the first examples of the gold
描述了在低温下在金(I)催化剂存在下1,6-炔烃与芳基环在C3-C4处空前的立体选择性多米诺反应。该过程涉及一种新颖的5 - exo - dig环异构化-二聚序列,以提供正规的Diels-Alder加合物,该加合物在室温下经历平滑的金催化双键迁移。另外,报道了金内消旋卡宾与苯甲醛介导的这些炔烃的[2 + 2 + 2]环加成反应的第一个实例。