Hydroxyamine hydrochloride → 2(R)-(3-chloro-4-methanesulfonyl-phenyl)-3-(4-hydroxyimino-cyclohexyl)-N-(5-methyl-pyridin-2-yl)-propionamide

Participants

Reaction Conditions

Reaction Steps

A solution of hydroxylamine hydrochloride (26.0 mg, 0.36 mmol) in methanol (0.7 mL) and 2,6-lutidine (0.7 mL) was treated with 2(R)-(3-chloro-4-methanesulfonyl-phenyl)-N-(5-methyl-pyridin-2-yl)-3-(4-oxo-cyclohexyl)-propionamide (prepared as in Example 64, 105 mg, 0.23 mmol). The reaction mixture was stirred at 25° C. for 30 min and was then concentrated in vacuo to remove methanol. The resulting residue was suspended in ethyl acetate (10 mL), washed with water (1×5 mL), dried over magnesium sulfate, and concentrated in vacuo. Biotage chromatography (FLASH 40S, Silica, 65/35 hexanes/ethyl acetate to 2/8 hexanes/ethyl acetate) afforded 2(R)-(3-chloro-4-methanesulfonyl-phenyl)-3-(4-hydroxyimino-cyclohexyl)-N-(5-methyl-pyridin-2-yl)-propionamide was a white foam; [α]23589=−7.84° (c=0.37 chloroform); EI-HRMS m/e calcd for C22H26ClN3O4S (M+H)+ 464.1406, found 464.1409.

Provenance & Evidence