Gold(I)-catalyzed benzannulation of 3-hydroxy-1,5-enynes: an efficient synthesis of substituted tetrahydronaphthalenes and related compounds
作者:Christiane M. Grisé、Eric M. Rodrigue、Louis Barriault
DOI:10.1016/j.tet.2007.10.084
日期:2008.1
We report a novel gold(I)-catalyzed benzannulation of 3-hydroxy-1,5-enynes to prepare tetrahydronaphthalenes. The reaction is catalyzed by 2.5 mol % Ph3PAuCl and 2.5 mol % AgOTf in dichloromethane. We discovered that this process can be also catalyzed by 1 mol % Ph3PAuCl and 1 mol % TfOH. To the best of our knowledge, this constitutes the first report of an active gold catalyst generated from Au(PPh3)Cl
我们报告了一种新型的金(I)催化3-羟基-1,5-烯炔的苯并环烷制备四氢萘。该反应由在二氯甲烷中的2.5mol%的Ph 3 PAuCl和2.5mol%的AgOTf催化。我们发现,该过程也可以由1 mol%的Ph 3 PAuCl和1 mol%的TfOH催化。据我们所知,这是由Au(PPh 3)Cl和三氟甲磺酸生成的活性金催化剂的首次报道。该温和的方法与各种官能团相容,并且被证明是以高收率合成各种间位取代的芳族环的有效方法。