本文介绍的是通过 Rh(III) 催化的 2-苯氧基-1 H-苯并[ d ]咪唑与马来酰亚胺的形式 [5+1] 环化反应有效合成 1,3-苯并恶嗪螺琥珀酰亚胺衍生物。实验机理研究表明,该反应通过连续的 C H / N H 键断裂和 C C / C N 键形成以及 NH 导向基团无痕融合到螺杂环产物中进行。与先前报道的用于类似目的的方法相比,这种新型合成方案具有易于获得的底物、环境可持续且具有成本效益的氧化剂、高原子经济性和易于扩展等优点。
An efficient method to access 2-substituted benzimidazoles under solvent-free conditions
作者:Ping Lan、F. Anthony Romero、Threshia S. Malcolm、Benjamin D. Stevens、Dariusz Wodka、Gergely M. Makara
DOI:10.1016/j.tetlet.2008.01.100
日期:2008.3
An expeditious method to access 2-substituted benzimidazoles was developed. Both aromatic (phenols, anilines, and thiophenols) and alkyl nucleophiles (amines and thiols) react with 2-methylsulfonyl benzimidazole under solvent-free conditions to generate a variety of 2-substituted benzimidazoles. (c) 2008 Elsevier Ltd. All rights reserved.
MARTIN, D.;TITTELBACH, F., J. CHEM.SOC. PERKIN TRANS., 1985, N 5, 1007-1013