A convenient method for the synthesis of N-hydroxyureas
作者:Dennis A. Parrish、Zhou Zou、C. Leigh Allen、Cynthia S. Day、S. Bruce King
DOI:10.1016/j.tetlet.2005.10.091
日期:2005.12
Treatment of amines with 1-(4-nitrophenol)-N-(O-benzylhydroxy)carbamate yields the O-benzyl protected N-hydroxyureas. Hydrogenation of the O-benzyl protected N-hydroxyureas over 5% Pd/BaSO4 cleanly gives the N-hydroxyureas in good yield. In addition to primary and secondary aliphatic and aromaticamines, this method converts amino sugars to the corresponding N-hydroxyureas without extensive protecting