Synthesis of Weinreb Amides via Pd-Catalyzed Aminocarbonylation of Heterocyclic-Derived Triflates
作者:A. Deagostino、Paolo Larini、Ernesto G. Occhiato、Lorena Pizzuto、Cristina Prandi、Paolo Venturello
DOI:10.1021/jo7024898
日期:2008.3.1
lactone-, and thiolactone-derived triflates into N-methoxy-N-methyl or morpholine Weinreb amides has been realized using Pd-catalyzed aminocarbonylation under CO atmospheric pressure and at room temperature. The carbonylative coupling can be efficiently carried out with 2% of catalyst in the presence of Xantphos as a ligand. The amides smoothly react with nucleophiles to afford acylated aza-, oxa-, and
内酰胺,内酯和硫代内酯衍生的三氟甲磺酸酯直接转化为N-甲氧基-N-甲基或吗啉Weinreb酰胺已在CO大气压和室温下使用Pd催化的氨基羰基化反应实现。在Xantphos作为配体的存在下,可以用2%的催化剂有效地进行羰基化偶联。酰胺与亲核试剂平稳反应,提供酰化的氮杂,氧杂和硫杂环基。所提议的方法可以被有利地用于二烯酮的合成,其中双键之一嵌入杂环部分中,作为纳扎罗夫环化的有用底物。