Potassium Carbonate → HCID 59637265, compound

Participants

Reaction Conditions

Reaction Steps

To a solution of (3-tert-butyl-1-(3-chlorophenyl)-1H-pyrazol-5-yl)methanamine (5 g, 0.018 mol) in DMF (25 ml, 5 times), potassium carbonate (9.16 g, 0.066 mol, 3.5 eq) was added and cooled the contents to 0° C. Then phenyl chloroformate (3.28 g (2.65 ml), 0.02 mol, 1.1 eq) was added drop wise for 15 min and the overall reaction mixture was stirred for another 15 min at 0° C. Progress of the reaction was monitored by TLC (20% ethyl acetate/hexane, Rf˜0.3). On completion of the reaction, reaction contents were filtered, filtrate was diluted with cold water (100 ml) and the product extracted with ethyl acetate (3×25 ml). Combined organic layer was washed with brine solution (100 ml), dried over sodium sulfate and concentrated under reduced pressure. Crude obtained was purified by column chromatography (silica gel, 10% ethyl acetate/hexane) to yield the required product as a white solid (3.2 g, 45% yield).

Provenance & Evidence