4,5-Dimethyl-1,2-phenylenediamine → HCID 135804678, compound

Participants

Reaction Conditions

Reaction Steps

A mixture of 4,5-dimethylbenzene-1,2-diamine (70 mg) and 4-fluoro-1H-indazole-3-carbaldehyde [80 mg, Reference Example 20(b)] in dimethylformamide (8 ml) was heated to 120° C. for 30 minutes and then at 100° C. for 16 hours. The reaction mixture was cooled, then diluted with ethyl acetate and then washed five times with brine. The organic phase was dried over magnesium sulfate and then evaporated. The residue was subjected to flash column chromatography on silica eluding with a mixture of 40/60 petrol and ethyl acetate (1:5, v/v) to give 3-(5,6-dimethyl-1H-benzoimidazol-2-yl)-4-fluoro-1H-indazole (104 mg) as a light brown solid. MS: 281 (M+H)+. HPLC (METHOD B1): RT=10.08 minutes. (b) 4-Chloro-3-(5,6-dimethyl-1H-benzoimidazol-2-yl)-1H-indazole

Provenance & Evidence