Palladium-Catalyzed Regioselective Hydrodebromination of Dibromoindoles: Application to the Enantioselective Synthesis of Indolodioxane U86192A
摘要:
A novel approach to the selective preparation of 4-bromoindoles was developed via Pd(OAc)(2)/rac-BINAP catalytic reactions. A variety of 4,6-dibromoindoles were transformed to 4-bromoindoles with high regioselectivity. This methodology, along with C-N and C-O bond-forming reactions developed in our laboratory, was applied to the enantioselective synthesis of indolodioxane U86192A, an antihypertensive agent.
在过去的几年中,通过芳基卤化物或三氟甲磺酸酯和胺的交叉偶联使用钯催化的芳香碳氮键形成反应已成为一种有用的合成工具。在这里,我们描述了一种铜(I)催化剂体系,该体系可以有效合成官能化的吲哚和吡咯并[2,3- c ]吡啶。该方法利用氨基酸促进的胺与芳基卤化物的铜偶联,特别是使用CuI-1-脯氨酸催化剂体系。