Sulfonyl Azides as Precursors in Ligand-Free Palladium-Catalyzed Synthesis of Sulfonyl Carbamates and Sulfonyl Ureas and Synthesis of Sulfonamides
作者:Shiao Y. Chow、Marc Y. Stevens、Luke R. Odell
DOI:10.1021/acs.joc.5b02755
日期:2016.4.1
An efficient synthesis of sulfonyl carbamates and sulfonyl ureas from sulfonyl azides employing a palladium-catalyzed carbonylation protocol has been developed. Using a two-chamber system, sulfonyl azides, PdCl2, and CO gas, released ex situ from Mo(CO)6, were assembled to generate sulfonyl isocyanates in situ, and alcohols and aryl amines were exploited as nucleophiles to afford a broad range of sulfonyl
已经开发了使用钯催化的羰基化方案从磺酰叠氮化物有效合成磺酰氨基甲酸酯和磺酰脲的方法。使用两腔室系统,从Mo(CO)6异位释放的磺酰叠氮化物PdCl 2和CO气体被组装以原位生成磺酰基异氰酸酯,并且醇和芳基胺被用作亲核试剂以提供广泛的应用范围氨基甲酸酯磺酸盐和磺酰脲。还开发了通过亲核取代从磺酰基叠氮化物和胺直接形成取代的磺酰胺的方案。