反应详情

3-(4-Chloro-3-methyl-phenyl)-1-{3-[4-(2-cyano-phenyl)-piperazin-1-yl]-2-hydroxy-propyl}-1,4,6,7-tetrahydro-pyrazolo[4,3-c]pyridine-5-carboxylic acid tert-butyl ester (1.26 g, 2.13 mmol) was dissolved in trifluoroacetic acid (3 mL) and CH2Cl2 (3 mL) and allowed to stir for 2 h. The reaction mixture was concentrated, taken up in EtOAc (50 mL) and washed with aqueous NaHCO3 (2×25 mL). The EtOAc layer was dried over Na2SO4 and concentrated to give 2-(4-{3-[3-(4-chloro-3-methyl-phenyl)-4,5,6,7-tetrahydro-pyrazolo[4,3-c]pyridin-1-yl]-2-hydroxy-propyl}-piperazin-1-yl)-benzonitrile (1.05 g, 99%) as a yellow foam. TLC (silica, 10% MeOH/CH2Cl2): Rf=0.27. MS (electrospray): m/z 491.2 (491.2, calculated for C27H31ClN6O, [M+H]+). 1H NMR (400 MHz, CDCl3): 9.8 (br s, 1H), 7.55 (d, J=7.6 Hz, 1H), 7.50 (t, J=8.2 Hz, 1H), 7.38 (s, 1H), 7.31 (d, J=8.2 Hz, 1H), 7.20 (d, J=8.2 Hz, 1H), 7.11 (t, J=8.2 Hz, 1H), 6.98 (d, J=8.2 Hz, 1H), 4.56 (br s, 1H), 4.12-4.32 (m, 4H), 2.98-3.51 (m, 13H), 2.35 (s, 3H).

1. concentrationThe reaction mixture was concentrated
2. washwashed with aqueous NaHCO3 (2×25 mL)
3. dry with materialThe EtOAc layer was dried over Na2SO4
4. concentrationconcentrated