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
[反应:见正文]报道了一种在二氯乙酸存在下通过用硼烷·吡啶配合物还原树脂结合的肟来制备O-连接的聚合物结合的N-取代的羟胺的有效方法。通常用于亚胺或肟还原的其他还原体系无效,包括在乙酸存在下的硼烷。吡啶。衍生自各种芳族和脂族醛和酮的肟已成功还原。将N-取代的产物酰化并从树脂上裂解,得到N-取代的异羟肟酸。