Acetyl chloride → HCID 22063877, compound

Participants

Reaction Steps

5-(5-Amino-1-methyl-3-phenyl-1H-pyrazol-4-yl)-1-cyclobutyl-3-methyl-1,3-dihydro-benzoimidazol-2-one is prepared according to the methods described in Example 336. 5-(5-Amino-1-methyl-3-phenyl-1H-pyrazol-4-yl)-1-cyclobutyl-3-methyl-1,3-dihydro-benzoimidazol-2-one (0.05 g) is diluted with chloroform (0.5 mL) and is treated with triethyl amine (0.04 mL) and acetyl chloride (0.02 mL). The reaction is allowed to stir for 1 hour then is diluted with saturated sodium bicarbonate and extracted with ethyl acetate. After concentration of the organic layer the product is purified by silica gel chromatography to give N-[4-(1-Cyclobutyl-3-methyl-2-oxo-2,3-dihydro-1H-benzoimidazol-5-yl)-2-methyl-5-phenyl-2H-pyrazol-3-yl]-acetamide. Similar reaction conditions utilizing the appropriate isocyanate, chloroformate or sulfonyl halide can be used to prepare ureas, carbamates and sulfonamides.

Provenance & Evidence