Acetyl chloride → N-(1-cyano-4-(4-ethoxy-3-methylphenylsulfonamido)cyclohexyl)acetamide

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Acetyl chloride (0.106 g, 1.356 mmol) in dichloromethane (1 ml) was added to room temperature solution of N-(4-amino-4-cyanocyclohexyl)-4-ethoxy-3-methylbenzenesulfonamide (Intermediate 124, 0.366 g, 1.085 mmol) in dichloromethane (9 ml) and the reaction was stirred 18 hours. The reaction was diluted with dichloromethane and rinsed with two volumes of saturated sodium bicarbonate. The organics were dried over magnesium sulfate, filtered, and concentrated to yield 464 mg of a crude film. TLC (50% ethyl acetate in heptane) indicated a major spot Rf=0.07 by UV. The crude product was chromatographed on Biotage 25S by TLC generated gradient to yield N-(1-cyano-4-(4-ethoxy-3-methylphenylsulfonamido)cyclohexyl)-acetamide (320 mg, 0.843 mmol) as a colorless solid. Carbon-13 NMR displayed a characteristic signature for nitrile at 119.1 ppm along with a signal at 110.7 ppm for the aromatic carbon ortho to aryl ether; in addition the peaks at 169.7 ppm and 160.97 ppm represent the amide and ipso-carbon of the aryl ether (no assignment implied). LCMS [M+H]=380.2.

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