反应详情

To a mixture of tert-butyl (1E,4E)-4-((3-(tert-butyldimethylsilyloxy)propyl)(propyl)carbamoyl)-8-(4-(pyrrolidine-1-carbonyl)phenyl)-3H-benzo[b]azepin-2-ylcarbamate (459 mg, 0.37 mmol) in CH2Cl2 (4 mL) at 0° C. was added TFA (1.00 mL). The resulting mixture was warmed to room temperature and stirred for 1 h. The reaction mixture was concentrated under reduced pressure to give the crude material that was azeotroped with toluene-EtOH (3 mL/1 mL) twice. The crude material was dried under reduced pressure for 30 min. The crude material was dissolved into CH2Cl2 (˜3 mL) again and treated with NH3 in MeOH (0.30 mL, 2.1 mmol, 7 N solution in MeOH) at room temperature. The resulting mixture was stirred for 1 h. The resulting mixture was concentrated under reduced pressure to give the crude material that was purified by silica gel flash column chromatography (3 to 7% MeOH in CH2Cl2, gradient) to afford 105 mg (59%) of (1E,4E)-2-amino-N-(3-hydroxypropyl)-N-propyl-8-(4-(pyrrolidine-1-carbonyl)phenyl)-3H-benzo[b]azepine-4-carboxamide. MS APCI (+) m/z 475 detected; 1H-NMR (400 MHz, CDCl3) δ 7.67 (d, 2H), 7.60 (d, 2H), 7.51 (br s, 1H), 7.30-7.37 (m, 2H), 6.88 (s, 1H), 3.60-3.69 (m, 6H), 3.48-3.52 (m, 4H), 2.83 (s, 2H), 1.82-2.00 (m, 6H), 1.68-1.74 (m, 2H), 0.93 (t, 3H).

1. concentrationThe reaction mixture was concentrated under reduced pressure
2. customto give the crude material that
3. customwas azeotroped with toluene-EtOH (3 mL/1 mL) twice
4. dry with materialThe crude material was dried under reduced pressure for 30 min
5. dissolutionThe crude material was dissolved into CH2Cl2 (˜3 mL) again
6. stirringThe resulting mixture was stirred for 1 h
7. concentrationThe resulting mixture was concentrated under reduced pressure
8. customto give the crude material that
9. customwas purified by silica gel flash column chromatography (3 to 7% MeOH in CH2Cl2, gradient)