Hypervalent Iodine Oxidative Rearrangement of Anthranilamides, Salicylamides and Some β-Substituted Amides: A New and Convenient Synthesis of 2-Benzimidazolones, 2-Benzoxazolones and Related Compounds
作者:Om Prakash、Hitesh Batra、Harpreet Kaur、Pawan K. Sharma、Vijay Sharma、Shiv P. Singh、Robert M. Moriarty
DOI:10.1055/s-2001-12346
日期:——
Oxidation of anthranilamides, salicylamides and some b-substituted amides with iodobenzene diacetate in methanolic potassium hydroxide led to a new and convenientsynthesis of 2-benzimidazolones, 2-benzoxazolones and relatedcompounds, respectively. The reaction probably occurs via initial Hofmann-type rearrangement followed by intramolecular cyclization of intermediate isocyanate.
Highly Efficient Synthesis of Ureas and Carbamates from Amides by Iodosylbenzene-Induced Hofmann Rearrangement
作者:Peng Liu、Zhiming Wang、Xianming Hu
DOI:10.1002/ejoc.201101784
日期:2012.4
A simple and efficient method for the synthesis of 1,3-disubstituted ureas and carbamates from amides by using iodosylbenzene as the oxidant is described. Symmetric and asymmetric ureas and carbamates can be prepared by this procedure in up to 98 % yield. Ureidopeptides can also be prepared in good yield by this method.