Syntheses of Benzimidazoles, Quinoxalines and 3,3-Dihydro 1 H-1,5-benzodiazepines Starting from o-Phenylenediamine

• 来源期刊: 中国化学(英文版)
• 年，卷（期）: 2005,（5）
• 页码范围: 589-595
• 页数: 7页
• 语种: 英文

摘要

A series of benzo-fused heteroaromatic compounds with 5-, 6- and 7-membered rings, such as benzimidazole,quinoxaline and 1H-1,5-benzodiazepine derivatives, were synthesized through condensation reaction of o-phenyl-enediamine with aryl aldehydes or ketones. The experimental conditions were carefully examined, and the products were characterized by 1H NMR, 13C NMR, MS, IR and elemental analyses. In addition, the structure of a benzodiazaepine derivative with 7-membered ring was confirmed by single crystal X-ray diffraction analysis.