Investigation of the Transition-Metal- and Acid-Catalyzed Reactions of β-(<i>N</i>-Tosyl)amino Diazo Carbonyl Compounds
作者:Nan Jiang、Zhihua Ma、Zhaohui Qu、Xiaoyu Xing、Linfeng Xie、Jianbo Wang
DOI:10.1021/jo0259818
日期:2003.2.1
beta-(N-tosyl)amino diazo carbonyl compounds have been prepared by nucleophilic condensation of N-tosylimines with acyldiazomethanes. The diazo decomposition of these diazo carbonyl compounds under various catalytic conditions, including Rh(II) carboxylates, Cu(I) and Cu(II) complexes, PhCO(2)Ag/Et(3)N, TsOH, and SnCl(2).2H(2)O, has been investigated. It was found that, in most cases, the diazo decomposition gave
通过N-甲苯磺胺类与酰基重氮甲烷的亲核缩合制备了一系列β-(N-甲苯磺酰基)氨基重氮羰基化合物。这些重氮羰基化合物在各种催化条件下的重氮分解,包括羧酸Rh(II),Cu(I)和Cu(II)配合物,PhCO(2)Ag / Et(3)N,TsOH和SnCl(2) .2H(2)O,已被调查。发现在大多数情况下,重氮分解优先产生1,2-芳基迁移产物,但当PhCO(2)Ag / Et(3)N是催化体系时,1,2-氢化物迁移占主导。Hammett相关性已用于分析1,2-芳基迁移的电子效应。讨论了控制迁移偏好和反应机理的因素。