Photoredox Approach to <i>N</i>-Acyl-<i>N′</i>-aryl-<i>N</i>,<i>N′</i>-aminals Using Enamides and Their Conversion to γ-Lactams
作者:Olusesan K. Koleoso、Mark R. J. Elsegood、Simon J. Teat、Marc C. Kimber
DOI:10.1021/acs.orglett.7b03946
日期:2018.2.16
A photoredox catalytic approach to synthetically valuable N-acyl-N′-aryl-N,N′-aminals is described. This method uses the addition of a radical precursor to enamides, with subsequent interception of the cationic iminium intermediate with an arylamine. The reaction has been shown to be compatible with electron-rich and electron-deficient arylamines, and moderate to good levels of diastereoselectivity
描述了用于合成有价值的N-酰基-N'-芳基-N,N'-缩醛的光氧化还原催化方法。该方法使用自由基前体添加到酰胺中,随后用芳基胺截取阳离子亚胺中间体。已经表明该反应与富电子和缺电子的芳胺相容,并且使用手性烯酰胺可以实现中等至良好水平的非对映选择性。此外,N-酰基-N'-芳基-N,N'-氨基反应产物可以容易地环化,为有价值的γ-内酰胺提供了新颖的合成途径。