Surface-Mediated Reactions. 9. Selective Oxidation of Primary and Secondary Amines to Hydroxylamines<sup>1</sup>
作者:John D. Fields、Paul J. Kropp
DOI:10.1021/jo0002083
日期:2000.9.1
OXONE over silica gel or, in some cases, alumina has been found to oxidize the primary and secondary amines 3 selectively to the corresponding hydroxylamines 4, in either the presence or absence of a solvent. Treatment of Boc-protected L-lysine (6) under the latter conditions afforded hydroxylamine 7 in excellent yield. The trialkylamine 1a and pyridine (1b), in which selectivity is not an issue, were
已经发现,在存在或不存在溶剂的情况下,在硅胶上的OXONE或在某些情况下在氧化铝上可将伯胺和仲胺3选择性氧化为相应的羟胺4。在后一条件下处理Boc保护的L-赖氨酸(6),得到羟胺7,产率极高。选择性不成问题的三烷基胺1a和吡啶(1b)可以通过OXONE在硅胶或氧化铝上以及(CH(3))(3)COOH在硅胶上容易氧化为相应的氧化物2 。微波辐照辅助的无溶剂氧化更具强迫性,同时仍然选择性地提供羟胺4,是选择的合成方法。讨论了这些反应的机理。