Diisopropylethylamine → N-((1R,2S)-3-(3,5-difluorophenyl)-1-hydroxy-1-((2R,4R)-4-propoxypyrrolidin-2-yl)propan-2-yl)-3-((R)-2-(methoxymethyl)pyrrolidine-1-carbonyl)-5-methylbenzamide

Participants

Reaction Steps

Step 8 (A): (2R,4R)-tert-butyl 2-((1S,2S)-1-(tert-butyldimethylsilyloxy)-3-(3,5-difluorophenyl)-2-(3-((R)-2-(methoxymethyl)pyrrolidine-1-carbonyl)-5-methylbenzamido)propyl)-4-propoxypyrrolidine-1-carboxylate. To a solution of 3-(((1S,2S)-1-((2R,4R)-1-(tert-butoxycarbonyl)-4-propoxypyrrolidin-2-yl)-1-(tert-butyldimethylsilyloxy)-3-(3,5-difluorophenyl)propan-2-yl)carbamoyl)-5-methylbenzoic acid (Preparation G, 28 mg, 0.038 mmol) in dichloromethane (1 mL) was added Hunig's base (14 mg, 0.114 mmol) to make a clear solution and HATU (19 mg, 0.05 mmol) was then added. After stirring for 20 min, the reaction mixture was added (R)-2-(methoxymethyl)pyrrolidine (65 mg, 0.057 mmol) and the reaction mixture was stirred at rt overnight. Ethyl acetate (100 mL) was added and the mixture was washed with Brine, H2O, dried and concentrated to give 30 mg of the title compound (95% yield): 1H NMR (CDCl3, 500 MHz) δ ppm 0.01 (3H, s), 0.06 (3H, s), 0.85 (9H, s), 0.88 (3H, t, J=5 Hz), 1.48-1.54 (11H, m), 1.73 (1H, m), 1.92-2.09 (5H, m), 2.18 (1H, m), 2.38 (3H, s), 2.62 (1H, m), 2.96 (1H, m), 3.05 (1H, m), 3.26-3.39 (5H, m), 3.47 (1H, m), 3.58 (1H, m), 3.68 (1H, m), 3.76 (1H, dd, J=5, 15 Hz), 3.97 (1H, m), 4.04-4.07 (1H, m), 4.11-4.14 (1H, m), 4.41 (1H, brd s), 4.56 (1H, m), 6.59 (1H, m), 6.76 (1H, s), 6.77 (1H, s), 7.43 (1H, s), 7.72 (1H, s), 7.74 (1H, s), 7.98 (1H, brd s). MS (ESI) (M+H)+ 788.61.

Provenance & Evidence