Ligand effects in the metal catalysed reactions of N-aryldiazoamides: Ylide formation vs. insertion reactions
作者:Christopher J Moody、Soyfur Miah、Alexandra M.Z Slawin、Darren J Mansfield、Ian C Richards
DOI:10.1016/s0040-4020(98)00525-0
日期:1998.8
Diazoamides 1a and 1b were prepared from 2-(O-allyl)- and 2-(S-allyl) anilines 2 respectively. Copper(II) catalysed decomposition of 1 resulted in formation of benzofused heterocycles 7 by [2,3]-rearrangement of the intermediate ylide. Rhodium(II) perfluorbutyramide catalysed reaction, however, gave mainly the indoles 8, 9 whereas rhodium(II) acetate catalysed reaction resulted in a mixture of products
重氮酰胺1a和1b分别由2-(O-烯丙基)-和2-(S-烯丙基)苯胺2制备。铜(II)催化的1分解通过中间内立基的[2,3]重排导致苯并稠合杂环7的形成。然而,铑(II)全氟丁酰胺催化的反应主要产生吲哚8、9,而乙酸铑(II)催化的反应产生产物的混合物,其中分子内CH插入形成的β-内酰胺占主导。N-吡啶基重氮酰胺13的催化分解得到稳定的吡啶鎓叶立德14。