Regioselective Synthesis of 3-Benzazepinones and Unexpected 5-Bromo-3-benzazepinones
作者:Lei Zhang、Deju Ye、Yu Zhou、Guannan Liu、Enguang Feng、Hualiang Jiang、Hong Liu
DOI:10.1021/jo100378u
日期:2010.6.4
A regioselective hydroamidation of 2-(1-alkynyl)phenylacetamides with Au(PPh3)Cl/AgSbF6 as the catalyst proceeded by a 7-endo-dig pathway to afford 3-benzazepinones. This method accommodates a broad range of alkyl and aryl alkynyl substitutes in moderate to high yields (63−91%). Moreover, unexpectedly, we also discovered a gold-mediated transformation from 2-(1-alkynyl)phenylacetamides to 5-bromo-3-benzazepinones
以Au(PPh 3)Cl / AgSbF 6为催化剂的2-(1-炔基)苯基乙酰胺的区域选择性加氢酰胺化通过7-内-挖途径进行,得到3-苯并enza庚酮。该方法以中等至高收率(63-91%)容纳了广泛的烷基和芳基炔基取代基。此外,出乎意料的是,我们还发现了金介导的从2-(1-炔基)苯基乙酰胺到5-溴-3-苯并ze庚酮的转化,发现AuBr 3不仅在其中起活化作用,而且还起着反应物的作用。第一次反应。