The Newman-Kwart Rearrangement of<i>O</i>-Aryl Thiocarbamates: Substantial Reduction in Reaction Temperatures through Palladium Catalysis
作者:Jeremy N. Harvey、Jesús Jover、Guy C. Lloyd-Jones、Jonathan D. Moseley、Paul Murray、Joseph S. Renny
DOI:10.1002/anie.200903908
日期:2009.9.28
Newman–Kwart rearrangement allows an escape from the harsh thermal conditions of the standard uncatalyzed reaction (see scheme). Mechanistic investigations, employing kinetic, isotopic labelling (2H, 18O, 34S) and DFT studies, suggest that the reaction proceeds through a five‐centred Pd–S coordinated oxidative addition, with intermolecular exchange of aryl and thiocarbamate moieties through dimerization of the
更凉爽:开发用于纽曼-科沃特重排的催化剂可以摆脱标准未催化反应的苛刻热条件(请参阅方案)。使用动力学,同位素标记(2 H,18 O,34 S)和DFT研究的机理研究表明,该反应通过五中心的Pd–S配位氧化加成进行,通过芳基和硫代氨基甲酸酯部分的分子间交换,通过静止状态。