中文名称 | 英文名称 | CAS号 | 化学式 | 分子量 |
---|---|---|---|---|
4-甲基-1H-苯并[d]咪唑-2(3H)-硫酮 | 2-mercapto-4-methylbenzimidazole | 27231-33-0 | C8H8N2S | 164.231 |
6-溴-4-甲基-1H-苯并[d]咪唑 | 6-bromo-4-methylbenzimidazole | 255064-10-9 | C8H7BrN2 | 211.061 |
中文名称 | 英文名称 | CAS号 | 化学式 | 分子量 |
---|---|---|---|---|
1,4-二甲基-1H-苯并咪唑 | 1,4-dimethyl-1H-benzo[d]imidazole | 73902-54-2 | C9H10N2 | 146.192 |
1,7-二甲基-1H-苯并咪唑 | 1,7-dimethyl-1H-benzo[d]imidazole | 17583-45-8 | C9H10N2 | 146.192 |
A new convenient method for the conversion of 2-nitroanilines into benzimidazoles by two-step one-pot procedure is reported. The procedure involves the reduction of nitro group followed by the intramolecular cyclisation of the corresponding o-phenylenediamines utilising thiourea dioxide and sodium hydroxide at 70 °C in mixed solvents of H2O and EtOH (v/v, 3/1). The yields are good to excellent and the workup is simple.