Formation of N-heterocycles by the reaction of thiols with glyoxamides: exploring a connective Pummerer-type cyclisation
作者:Marc Miller、Johannes C. Vogel、William Tsang、Andrew Merrit、David J. Procter
DOI:10.1039/b816608k
日期:——
The reaction of thiols with glyoxamides provides a convenient method for the generation of thionium ions and the initiation of Pummerer-type reactions. When the glyoxamides contain tethered aromatic nucleophiles, N-heterocycles are formed by a thionium ion cyclisation. The scope and mechanism of the connective Pummerer-type process has been investigated using a range of thiols, Lewis acids and both
硫醇与乙二酰胺的反应为生成硫鎓离子和引发Pummerer型反应提供了一种方便的方法。当乙二酰胺包含束缚的芳族亲核试剂时,N-杂环通过硫鎓离子环化形成。已使用一系列硫醇,路易斯酸以及单-和双-乙二酰胺酰胺研究了连接性Pummerer型方法的范围和机理。在吲哚喹啉天然产物新隐油菜碱的合成中已经说明了该方法的效用。