由邻苯二胺合成苯并咪唑、喹喔啉以及1-H-2,3－二氢1,5-苯并氮杂卓

A series of benzo-fused heteroaromatic compounds with 5-, 6- and 7-membered tings, such as benzimidazole,quinoxaline and 1H-1,5-benzodiazepine derivatives, were synthesized through condensation reaction of o-pheny1-enediamine with ary1 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.

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

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‐phenylenediamine 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.