反应详情

A suspension of 7-(3-t-butyl-5-amino-1H-pyrazol-1-yl)-3,4-dihydroisoquinoline-1(2H)-thione (0.150 g, 0.499 mmol) in THF (3 mL) was added to a solution of 2,3-dichlorophenyl isocyanate (0.141 g, 0.749 mmol), pyridine (0.061 mL, 0.059 g, 0.749 mmol) and THF (3 mL). The flask which contained the starting material was again rinsed with THF (4 mL) and the solution was added to the reaction flask. The resulting yellow suspension was briefly heated with a heat gun, causing the reaction mixture to become clear. After 18 h, the solution was concentrated and the residue was purified by column chromatography to yield 1-[3-t-butyl-1-(1-thioxo-1,2,3,4-tetrahydroisoquinolin-7-yl)-1H-pyrazol-5-yl]-3-(2,3-dichlorophenyl)urea as a yellow solid (203 mg, 83% yield). 1H NMR (400 MHz, acetone-d6): δ 9.60 (brs, 1H), 8.66 (d, J=2.0 Hz, 1H), 8.61 (brs, 1H), 8.26 (dd, J=8.4, and 2.0 Hz, 1H), 8.17 (brs, 1H), 7.68 (dd, J=8.0, and 2.0 Hz, 1H), 7.40 (d, J=8.4 Hz, 1H), 7.30 (t, J=8.2 Hz, 1H), 7.23 (dd, J=7.6, and 1.2 Hz, 1H), 6.48 (s, 1H), 3.62-3.58 (m, 2H), 3.07 (t, J=6.6 Hz, 2H), 1.33 (s, 9H); MS (ESI) m/z: 488.0 (M+H+).

1. washwas again rinsed with THF (4 mL)
2. additionthe solution was added to the reaction flask
3. temperatureThe resulting yellow suspension was briefly heated with a heat gun
4. concentrationthe solution was concentrated
5. customthe residue was purified by column chromatography