反应详情

温度

0 °C

To a stirred solution of Boc-N-Me-Ala-OH (2.55 g, 12.57 mmol) in DMF (30 mL) were added HATU (4.78 g, 12.57 mmol) and DIPEA (9.9 mL, 57.16 mmol). After 30 min, the mixture was cooled to 0° C. and {(3S,5S)-1-((S)-2-amino-2-cyclohexyl-acetyl)-5-[(R)-(1,2,3,4-tetrahydro-naphthalen-1-yl)carbamoyl]-pyrrolidin-3-yl}-carbamic acid 9H-fluoren-9-ylmethyl ester (Intermediate 24) (7.5 g, 11.43 mmol) in DMF (50 mL) and the cooling bath removed. After 4 h the mixture was diluted with ethyl acetate, washed with water, dried over sodium sulfate and concentrated. The residue was purified by silica gel chromatography to afford the title compound as an off white solid (5.32 g) LC-MS: 806 (M+H).

1. washwashed with water
2. dry with materialdried over sodium sulfate
3. concentrationconcentrated
4. customThe residue was purified by silica gel chromatography