N,N-dimethylchloromethaniminium chloride formed from dimethylformamide and oxalyl dichloride is an efficient reagent for the synthesis of N-substituted hydroxamic acids from carboxylic acids and N-substituted hydroxylamines in the presence of a base.
Convenient Preparation of <i>O</i>-Linked Polymer-Bound <i>N</i>-Substituted Hydroxylamines, Intermediates for Synthesis of <i>N</i>-Substituted Hydroxamic Acids
作者:Dale E. Robinson、Mark W. Holladay
DOI:10.1021/ol006152g
日期:2000.9.1
[reaction: see text] An efficient procedure for preparation of O-linked polymer-bound N-substituted hydroxylamines by reduction of resin-bound oximes with borane.pyridine complex in the presence of dichloroacetic acid is reported. Other reducing systems commonly used for imine or oxime reduction were ineffective, including borane.pyridine in the presence of acetic acid. Oximes derived from a variety