Chemoselective intramolecular aminocarbonylation of unsaturated amides under Wacker-type conditions
作者:Hiroto Harayama、Hirofumi Okuno、Yoshika Takahashi、Masanari Kimura、Keigo Fugami、Shuji Tanaka、Yoshinao Tamaru
DOI:10.1016/0040-4039(96)01650-4
日期:1996.9
The Wacker-type aminocarbonylation of unsaturated amides shows distinctive dependence of reactivity on the reaction medium: endo nitrogen nucleophiles (endo-carbanates3 and -ureas 5) undergo aminocarbonylation either in neat methyl orthoacetate (MOA) or in methanol containing AcONa and MOA, while exo nitrogen nucleophiles (exo-carbamates1a, -ureas 1b, and -sulfonamides 1c) in methanol (cat. PdCl2,
不饱和酰胺的瓦克型氨基羰基化反应显示出对反应介质的显着依赖性:内氮亲核试剂(内酰胺基3和脲5)在纯原乙酸甲酯(MOA)或含AcONa和MOA的甲醇中经历氨基羰基化。甲醇中的外氮亲核试剂(外氨基甲酸酯1a,-脲1b和-磺酰胺1c)(目录PdCl 2,在1 atm大气压下的化学计量CuCl 2)。普遍性由7a-d的化学选择性转化表示为在MOA中为8a-d或在甲醇中为9a-d。