Synthesis of 1-Substituted Benzimidazoles from<i>o</i>-Bromophenyl Isocyanide and Amines
作者:Alexander V. Lygin、Armin de Meijere
DOI:10.1002/ejoc.200900820
日期:2009.10
o-Bromophenyl isocyanide (1-Br) reacts with various primary amines under CuI catalysis to afford 1-substituted benzimidazoles 4 in moderate to good yields (38–70 %, 13 examples). Analogously, 2-bromo-3-isocyanothiophene (6) furnishes 3-substituted 3H-thieno[2,3-d]imidazoles 7 (44–49 %, 3 examples). (© Wiley-VCH Verlag GmbH & Co. KGaA, 69451 Weinheim, Germany, 2009)
邻溴苯基异氰化物 (1-Br) 在 CuI 催化下与各种伯胺反应,以中等至良好的产率(38-70%,13 个例子)得到 1-取代的苯并咪唑 4。类似地,2-bromo-3-isocyanothiophene (6) 提供了 3-取代的 3H-噻吩并 [2,3-d] 咪唑 7(44-49%,3 个例子)。(© Wiley-VCH Verlag GmbH & Co. KGaA, 69451 Weinheim, Germany, 2009)