反应详情

(R)-3-[5-(1-Benzenesulfonyl-1H-pyrrolo[2,3-b]pyridin-3-yl)-thiophen-2-yl]-3-{[1-(3,4-difluoro-benzyl)-2-oxo-1,2-dihydro-pyridine-3-carbonyl]-amino}-propionic acid methyl ester (0.050 g, 0.000072 mol;) was dissolved in 0.5 M of Sodium methoxide in methanol (3 mL) and Methylene chloride (3 g, 0.04 mol;). The reaction was heated at 75 C for 1 hour. LC-MS showed the disappearance of starting material and the appearance of product at 1.25 535.55. Some methyl ester and acid were seen but by the time it was injected on gilson only acid was present. The reaction was concentrated and dissolved in DMSO and methanol 1:1 for purification by Gilson Preparative HPLC. Pure fractions were combined and concentrated. ES (+) MS m/e=535.55; NMR (400 MHz, DMSO-d6) δ ppm 2.98 (d, 2H, J=7 Hz), 5.22 (s, 2H,), 5.66 (m, 1H), 6.66 (t, 1H, J=8 Hz), 7.03 (d, 1H, J=3 Hz), 7.14-7.20 (m, 2H), 7.22 (d, 1H, J=4 Hz), 7.38-7.49 (m, 2H), 7.81 (m, 1H), 8.2-8.25 (m, 2H), 8.29 (m, 1H), 8.4 (dd. 1H), 10.27 (d, 1H)

1. temperatureThe reaction was heated at 75 C for 1 hour
2. concentrationThe reaction was concentrated
3. dissolutiondissolved in DMSO
4. custommethanol 1:1 for purification by Gilson Preparative HPLC
5. concentrationconcentrated