用途:用于制造医药中间体。
中文名称 | 英文名称 | CAS号 | 化学式 | 分子量 |
---|---|---|---|---|
间氟硝基苯 | 3-fluoro-1-nitrobenzene | 402-67-5 | C6H4FNO2 | 141.102 |
4-氟-2-硝基乙酰苯胺 | 4-fluoro-2-nitroacetanilide | 448-39-5 | C8H7FN2O3 | 198.154 |
2,5-二氟硝基苯 | 1,4-difluoro-2-nitrobenzene | 364-74-9 | C6H3F2NO2 | 159.092 |
中文名称 | 英文名称 | CAS号 | 化学式 | 分子量 |
---|---|---|---|---|
4-氟-2-硝基-N-甲基苯胺 | 4-fluoro-N-methyl-2-nitroaniline | 704-05-2 | C7H7FN2O2 | 170.143 |
4-氟-5-硝基叠氮苯 | 1-azido-4-fluoro-2-nitrobenzene | 67312-96-3 | C6H3FN4O2 | 182.114 |
异氰酸 4-氟-2-硝基苯酯 | 1-isocyanato-4-fluoro-2-nitrobenzene | 190774-51-7 | C7H3FN2O3 | 182.111 |
间氟硝基苯 | 3-fluoro-1-nitrobenzene | 402-67-5 | C6H4FNO2 | 141.102 |
—— | 4-Fluoro-N-(1-methylethyl)-2-nitrobenzenamine | 146366-00-9 | C9H11FN2O2 | 198.197 |
—— | 4-Fluor-2-nitro-N-propylanilin | 35538-23-9 | C9H11FN2O2 | 198.197 |
2-氯-4-氟-6-硝基苯胺 | 2-chloro-4-fluoro-6-nitroaniline | 153505-32-9 | C6H4ClFN2O2 | 190.561 |
2-溴-4-氟-6-硝基苯胺 | 2-bromo-4-fluoro-6-nitroaniline | 10472-88-5 | C6H4BrFN2O2 | 235.012 |
2-氟-4-碘-6-硝基苯胺 | 4-fluoro-2-iodo-6-nitroaniline | 153505-44-3 | C6H4FIN2O2 | 282.013 |
—— | 3-[(4-fluoro-2-nitrophenyl)amino]propanenitrile | 328546-72-1 | C9H8FN3O2 | 209.18 |
—— | N-(4-fluoro-2-nitrophenyl)-β-alanine | 328546-73-2 | C9H9FN2O4 | 228.18 |
—— | (4-fluoro-2-nitro-phenylamino)-acetic acid | 66367-10-0 | C8H7FN2O4 | 214.153 |
—— | N-benzyl-4-fluoro-2-nitroaniline | 887572-14-7 | C13H11FN2O2 | 246.241 |
4-氟-5-硝基-1,2-苯二胺 | 1,2-diamino-4-fluoro-5-nitrobenzene | 113269-06-0 | C6H6FN3O2 | 171.131 |
—— | 4-fluoro-2-nitrotrifluoroacetanilide | 128691-91-8 | C8H4F4N2O3 | 252.125 |
—— | tert-butyl 4-fluoro-2-nitrophenylcarbamate | 579474-17-2 | C11H13FN2O4 | 256.234 |
1-溴-3-氟-5-硝基苯 | 1-bromo-3-fluoro-5-nitrobenzene | 7087-65-2 | C6H3BrFNO2 | 219.998 |
—— | 2-<<<4-(methylthio)phenyl>methyl>amino>-5-fluoronitrobenzene | 147643-69-4 | C14H13FN2O2S | 292.334 |
—— | N-(4-Fluoro-2-nitro-phenyl)-3-oxo-butyramide | 96089-45-1 | C10H9FN2O4 | 240.191 |
—— | 2-[(4-fluoro-2-nitro-phenyl)-hydrazono]-propionic acid ethyl ester | 1172997-05-5 | C11H12FN3O4 | 269.232 |
2-溴-5-氟硝基苯 | 2-bromo-5-fluoronitrobenzene | 446-09-3 | C6H3BrFNO2 | 219.998 |
4-氟-2-硝基苯硫醇 | 4-fluoro-2-nitrobenzenethiol | 654063-68-0 | C6H4FNO2S | 173.168 |
2-硝基-4-氟苯酚 | 2-nitro-4-fluorophenol | 394-33-2 | C6H4FNO3 | 157.101 |
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.