反应详情

In a 20 mL round-bottomed flask, 4-((2R,3S,4R,5S)-3-(3-chloro-2-fluorophenyl)-4-(4-chloro-2-fluorophenyl)-4-cyano-5-neopentylpyrrolidine-2-carboxamido)-3-methoxybenzoic acid (prepared as described in US20100152190A1, 100 mg, 162 μmol), HBTU (61.5 mg, 162 μmol) and Hunig's base (105 mg, 142 μL, 811 μmol) were combined with dry tetrahydrofuran (2 mL) to give an off-white suspension at room temperature. It was stirred at room temperature for 30 min. 1,11-Diamino-3,6,9-trioxaundecane (15.6 mg, 15.2 μL, 81.1 μmol) was added. After stirring at room temperature overnight, the reaction mixture was absorbed on small amount of silica gel, loaded on a 24 g pre-packed silica gel column and eluted with ethyl acetate to give (2R,3S,4R,5S)-4-(4-chloro-2-fluoro-phenyl)-3-(3-chloro-2-fluoro-phenyl)-4-cyano-5-(2,2-dimethyl-propyl)-pyrrolidine-2-carboxylic acid [4-(2-{2-[2-(2-amino-ethoxy)-ethoxy]-ethoxy}-ethylcarbamoyl)-2-methoxy-phenyl]-amide, dimer as white solid (148 mg, 66% yield). LCMS (ES+) m/z calcd. for C70H74Cl4F4N8O9 [(M+H)+]: 1387. found: 1387.

1. customto give an off-white suspension at room temperature
2. stirringAfter stirring at room temperature overnight
3. customthe reaction mixture was absorbed on small amount of silica gel
4. washeluted with ethyl acetate