Pyridine-2-sulfonyl Chloride → N-[3-(2-acetoxyethoxy)-1-methyl-4-(4-methylphenyl)-1H-pyrazol-5-yl]-pyridine-2-sulfonamide

Participants

Reaction Steps

To 2-{[5-amino-1-methyl-4-(4-methylphenyl)-1H-pyrazol-3-yl]oxy}ethyl acetate (Preparation 5) (750 mg) in dry pyridine (5 ml) at room temperature was added pyridine-2-sulphonyl chloride (748 mg), the mixture was stirred for 72 hours. The reaction was concentrated under reduced pressure and the residue re-evaporated from toluene. The residue was then partitioned between ethyl acetate (20 ml) and water (20 ml), dried over magnesium sulfate, filtered and concentrated under reduced pressure to yield the title compound as a yellow solid.

Provenance & Evidence