4-(4-Pyridyloxy)benzenesulfonyl chloride → 5-Methyl-4-[4-(pyridin-4-yloxy)-benzenesulfonylamino]-biphenyl-3-carboxylic acid methyl ester

Participants

Reaction Steps

To a solution of 1.43 g (5.93 mmol) of the product of Example 40 in 20 mL of pyridine was added 1.98 g (6.52 mmol) 4-(pyridin-4-yloxy)-benzenesulfonyl chloride and the reaction was stirred overnight. Additional 4-(pyridin-4-yloxy)-benzenesulfonyl chloride (0.5 g, 1.6 mmol) was added twice over the next two days. The reaction was then diluted with water and extracted three times with dichloromethane. The organics were combined, washed with brine, dried over Na2SO4, concentrated in vacuo and chromatographed on silica gel using gradient elution (100% hexane to 100% ethyl acetate) to provide 5-methyl-4-[4-(pyridin-4-yloxy)-benzenesulfonylamino]-biphenyl-3-carboxylic acid methyl ester 2.54 g (90%) as a white solid. Electrospray Mass Spec: 475.2 (M+H)+

Provenance & Evidence