反应详情

To a solution of tert-butyl (7bR,11aS)-6-amino-1,2,7b,10,11,11a-hexahydro-4H-[1,4]oxazepino[6,5,4-hi]pyrido[4,3-b]indole-9(8H)-carboxylate from EXAMPLE 56, Part B (35 mg, 0.10 mmol) in 5 mL of acetonitrile was added 2-fluoro-3-(trifluoromethyl)benzaldehyde (38 mg, 0.20 mmol) and three drops of glacial acetic acid. The reaction was stirred at ambient temperature for 1 h and then there was added sodium triacetoxyborohydride (64 mg, 0.30 mmol). The reaction was stirred at ambient temperature for 3 h and then was quenched by the addition of aq ammonium hydroxide. The mixture was extracted with methylene chloride, washed with brine, dried (K2CO3) and concentrated. The residue was taken up in 10 mL of methylene chloride and then there was added 5 mL of trifluoroacetic acid. The reaction was allowed to stir at ambient temperature for 3 h and then was concentrated in vacuo. The residue was purified by preparative HPLC (C18 reverse phase column, elution with a H2O/CH3CN gradient with 0.5% TFA) and the product containing fractions were concentrated, free-based with aq ammonium hydroxide, extracted with chloroform, washed with brine, dried (K2CO3) and concentrated to afford the title compound of EXAMPLE 126. 1H NMR (CDCl3) δ: 7.55-7.40 (m, 2H), 7.12 (t, 1H, J=7.7 Hz), 6.31 (d, 1H, J=2.0 Hz), 6.15 (d, 1H, J=1.9 Hz), 4.48 (ABq, 2H, JAB 14.3 Hz), 4.32 (s, 2H), 4.12 (app d, 1H), 3.63 (app t, 1H), 3.30-3.20 (m, 2H), 3.18-2.98 (m, 4H), 2.56 (app t, 1H), 2.43 (app t, 1H), 2.05-1.92 (m, 2H). LRMS (ES)+: 422.3 (M+H)+.

1. stirringThe reaction was stirred at ambient temperature for 3 h
2. customwas quenched by the addition of aq ammonium hydroxide
3. extractionThe mixture was extracted with methylene chloride
4. washwashed with brine
5. dry with materialdried (K2CO3)
6. concentrationconcentrated
7. additionthere was added 5 mL of trifluoroacetic acid
8. stirringto stir at ambient temperature for 3 h
9. concentrationwas concentrated in vacuo
10. customThe residue was purified by preparative HPLC (
11. washC18 reverse phase column, elution with a H2O/CH3CN gradient with 0.5% TFA) and the product
12. additioncontaining fractions
13. concentrationwere concentrated, free-based with aq ammonium hydroxide
14. extractionextracted with chloroform
15. washwashed with brine
16. dry with materialdried (K2CO3)
17. concentrationconcentrated