2-Thiophenecarboxaldehyde, 5-chloro- → N-{2-Bromo-4-[(5-chloro-thiophen-2-ylmethyl)-amino]-6-trifluoromethyl-phenyl}-3-cyclohexyl-propionamide

Participants

Reaction Conditions

Reaction Steps

N-(4-Amino-2-bromo-6-trifluoromethyl-phenyl)-3-cyclohexyl-propionamide (1.03 g) and 5-chloro-thiophene-2-carbaldehyde (310 uL) were dissolved in methanol (16 mL) and heated to 130° C. for 8 minutes in a sealed microwave process vial. Sodium cyanoborohydride (800 mg) was added and the reaction mixture was heated to 130° C. for 5 minutes in a sealed microwave process vial. Saturated aqueous sodium bicarbonate (100 mL) was added, the product was extracted with ethyl acetate (3×50 mL) and the combined organic phases were washed with water (2×100 mL) and brine (100 mL), dried over sodium sulfate and concentrated in vacuo. The crude product was purified by flash chromatography to furnish 517 mg (33% yield) of the title compound as a yellow solid. LC-MS (m/z) 524 (MH+); tR=4.09, (UV, ELSD) 99%, 99%. 1H NMR (500 MHz, DMSO-d6): 0.86 (q, 2H), 1.15 (m, 3H), 1.26 (m, 1H), 1.46 (q, 2H), 1.65 (m, 5H), 2.24 (t, 2H), 4.89 (d, 2H), 6.94 (d, 1H), 6.95 (d, 1H), 6.98 (d, 1H), 7.04 (t, 1H), 7.13 (d, 1H), 9.32 (s, 1H).

Provenance & Evidence