反应详情

Trifluoroacetic acid (3 mL) was added to a solution of 1-{3-[4-(2-cyano-phenyl)-piperazin-1-yl]-2-hydroxy-propyl}-3-(4-iodo-phenyl)-1,4,6,7-tetrahydro-pyrazolo[4,3-c]pyridine-5-carboxylic acid tert-butyl ester (0.402 g, 0.601 mmol) in CH2Cl2 (3 mL) and the reaction mixture was stirred for 2 h. The mixture was concentrated, then diluted with EtOAc. The organic layer was washed with aqueous NaHCO3 and brine, dried (Na2SO4), and concentrated to afford the amine (0.342 g, 100%) as a yellowish foam. TLC (silica, 10% acetone/CH2Cl2): Rf=0.14. MS (electrospray): m/z 569.2 (569.1, calculated for C26H29lN6O, [M+H]+). 1H NMR (400 MHz, CDCl3:CD3OD(6:1)): 7.73 (d, J=8.6 Hz, 2H), 7.56 (dd, J=7.6, 1.8 Hz, 1H), 7.52 (t, J=8.0 Hz, 1H), 7.25 (d, J=8.6 Hz, 2H), 7.09 (t, J=7.6 Hz, 1H), 7.02 (dd, J=8.4 Hz, 1H), 4.43-4.36 (m, 1H), 4.31 (s, 2H), 4.21 (dd, J=14.1, 4.5 Hz, 1H), 4.11 (dd, J=14.5, 6.3 Hz, 1H), 3.54-3.49 (m, 2H), 3.40-3.24 (m, 8H), 3.18-3.06 (m, 3H), 3.03-2.95 (m, 3H).

1. concentrationThe mixture was concentrated
2. additiondiluted with EtOAc
3. washThe organic layer was washed with aqueous NaHCO3 and brine
4. dry with materialdried (Na2SO4)
5. concentrationconcentrated