Hypervalent Iodine Catalyzed Hofmann Rearrangement of Carboxamides Using Oxone as Terminal Oxidant
作者:Akira Yoshimura、Kyle R. Middleton、Matthew W. Luedtke、Chenjie Zhu、Viktor V. Zhdankin
DOI:10.1021/jo302375m
日期:2012.12.21
Hofmann rearrangement of carboxamides to carbamates using Oxone as an oxidant can be efficiently catalyzed by iodobenzene. This reaction involves hypervalent iodine species generated in situ from catalytic amount of PhI and Oxone in the presence of 1,1,1,3,3,3-hexafluoroisopropanol (HFIP) in aqueous methanol solutions. Under these conditions, Hofmann rearrangement of various carboxamides affords corresponding
使用碘酮作为氧化剂,可将甲酰胺的霍夫曼重排成氨基甲酸酯可被碘苯有效地催化。该反应涉及在甲醇水溶液中在1,1,1,3,3,3-六氟异丙醇(HFIP)存在下由催化量的PhI和Oxone原位生成的高价碘物质。在这些条件下,各种羧酰胺的霍夫曼重排以高收率提供了相应的氨基甲酸酯。