Phosphorus oxychloride → HCID 67273736, compound

Participants

Reaction Conditions

Reaction Steps

A mixture of 17 mg (0.0745 mmol) of 1-methyl-7-(3-methyl-1H-pyrazol-1-yl)-1,3-dihydro-2H-benzimidazol-2-one in 0.5 mL of phosphorus oxychloride was stirred at 80° C. for 5 days. After cooling, phosphorus oxychloride was evaporated in vacuo. The residue was neutralized by 12 N aqueous sodium hydroxide. The aqueous suspension was extracted with ethyl acetate (X2). The combined organic layer was washed with water (X1) and brine (X1), dried over sodium sulfate and concentrated in vacuo. The residue was purified by preparative TLC eluting with a 30% ethylacetate/n-hexane mixture to give 2-chloro-1-methyl-7-(3-methyl-1H-pyrazol-1-yl)-1H-benzimidazole. A mixture 2-chloro-1-methyl-7-(3-methyl-1H-pyrazol-1-yl)-1H-benzimidazole obtained above, 48 mg (0.223 mmol) of 4-bromo-2-methoxy-6-methylaniline and 0.15 mL of 1-methyl-2-pyrrolidinone was stirred at 120° C. for 3 days. After cooling, the reaction mixture was neutralized by saturated aqueous sodium hydrogen carbonate. The aqueous suspension was extracted with ethyl acetate (X2). The combined organic layer was washed with water (X1) and brine (X1), dried over sodium sulfate and concentrated in vacuo. The residue was purified by preparative TLC eluting with a 75% ethylacetate/n-hexane mixture to give 5.7 mg (18%) of the title compound.

Provenance & Evidence