(Tosylimino)phenyl-λ<sup>3</sup>-iodane as a Reagent for the Synthesis of Methyl Carbamates via Hofmann Rearrangement of Aromatic and Aliphatic Carboxamides
作者:Akira Yoshimura、Matthew W. Luedtke、Viktor V. Zhdankin
DOI:10.1021/jo300007c
日期:2012.2.17
A new, mild procedure for the Hofmann rearrangement of aromatic and aliphatic carboxamides using (tosylimino)phenyl-λ3-iodane, PhINTs, as a reagent is reported. Because of the mild reaction conditions, this method is particularly useful for the Hofmann rearrangement of substituted benzamides, which usually afford complex reaction mixtures with other hypervalent iodine oxidants. The mild reaction conditions
一种新的,温和的程序使用(tosylimino)苯基-λ芳香族和脂肪族羧酰胺的霍夫曼重排3 -iodane,PhINTs,作为试剂被报告。由于反应条件温和,该方法对于取代的苯甲酰胺的霍夫曼重排特别有用,该苯甲酰胺通常会提供与其他高价碘氧化剂的复杂反应混合物。羧酰胺与PhINTs反应的温和反应条件和高选择性可以分离最初形成的不稳定异氰酸酯,或通过用醇处理将其随后转化为稳定的氨基甲酸酯。