Ammonium Chloride → HCID 118071144, compound

Participants

Reaction Steps

To a solution of Intermediate 351F (0.12 g, 0.257 mmol) in dry DMF (3 mL) was added HATU (0.195 g, 0.512 mmol), diisopropylethylamine (224 μL, 1.128 mmol) and ammonium chloride (0.0687 g, 1.128 mmol) and the reaction mixture was stirred at room temperature for 4 h. The reaction mixture was concentrated completely to dryness and the crude was partitioned between ethyl acetate and water. The organic layer was separated, washed with brine, dried over Na2SO4, filtered and the filtrate concentrated. The crude product was purified by silica gel chromatography (12 g REDISEP® column, eluting with 3-5% methanol in chloroform). Fractions containing the product were combined to afford Intermediate 351G (0.08 g, 67%) as an off-white solid. MS(ES): m/z=467 [M+H]+; 1H NMR (400 MHz, DMSO-d6) δ ppm 9.29 (s, 1H), 7.69-7.74 (m, 2H), 7.63-7.69 (m, 2H), 7.37-7.48 (m, 1H), 6.93 (br. s., 1H), 5.22 (d, J=18.07 Hz, 1H), 5.13 (t, J=5.27 Hz, 1H), 4.72 (d, J=4.52 Hz, 1H), 4.51 (d, J=18.57 Hz, 1H), 4.31-4.38 (m, 1H), 4.20-4.28 (m, 1H), 3.43 (t, J=6.02 Hz, 2H).

Provenance & Evidence