1-Ethyl-3-(3'-dimethylaminopropyl)carbodiimide → (2R)-2-methyl-4-(3-methyl-4-phenyl-1H-pyrazol-1-yl)-2-(methylsulfonyl)-N-(tetrahydro-2H-pyran-2-yloxy)butanamide

Participants

Reaction Steps

To a solution of (2R)-2-methyl-4-(3-methyl-4-phenyl-1H-pyrazol-1-yl)-2-(methylsulfonyl)butanoic acid (129 mg, 0.38 mmol, 1 eq) in anhydrous DCM (7 mL) was added DIPEA (140 uL, 0.804 mmol, 2.1 eq), followed by HOBt (120 mg, 0.784 mmol, 2.05 eq) and the solution was stirred at RT for 30 minutes. The mixture was then treated with O-tetrahydro-2H-pyran-2-yl-hydroxylamine (70 mg, 0.60 mmol, 1.6 eq) followed by EDCI (110 mg, 0.574 mmol, 1.5 eq) and the reaction was allowed to stir at RT. The reaction mixture was concentrated in vacuo to give a crude white solid. The crude mixture was purified via flash chromatography using an Analogix SF15-12 g silica column eluting with ethyl acetate in heptane (0-80%) to give (2R)-2-methyl-4-(3-methyl-4-phenyl-1H-pyrazol-1-yl)-2-(methylsulfonyl)-N-(tetrahydro-2H-pyran-2-yloxy)butanamide (110 mg, 66% yield). LC-MS M+H+436.1.

Provenance & Evidence