反应详情

To a solution of sodium hydride (46 mg, 1.16 mmol) in THF (5 ml), 3,9-dimethyl-1,2,3,4,5,6-hexahydroazepino[4,5-b]indole (0.1 g, 0.46 mmol) was added at 0° C. and stirred at RT for 30 min. tert-Butyl 4-(2-chloroacetyl)piperazine-1-carboxylate (147 mg, 0.55 mmol) was added slowly dropwise at RT and stirred for 2 h at RT. After completion of the reaction (monitored by TLC & LCMS), the reaction was quenched with ice water and extracted with ethyl acetate. The organic layer was washed with brine, dried over anhydrous sodium sulfate and evaporated under reduced pressure. Crude product was purified by column chromatography to afford free base, which was converted to HCl salt using ethanolic HCl (38 mg). The NMR confirmed removal of the Boc group when ethanolic HCl was used. 1H NMR (CD3OD, DiHCl salt) δ (ppm): 7.3 (s, 1H), 7.22 (d, 1H), 7.0 (d, 1H), 5.23 (d, 2H), 3.95-4.10 (m, 4H), 3.7-3.9 (m, 4H), 3.36-3.43 (m, 4H), 3.1-3.22 (m, 4H), 3.0 (s, 3H), 2.4 (s, 3H).

1. additionwas added slowly dropwise at RT
2. customAfter completion of the reaction (monitored by TLC & LCMS)
3. customthe reaction was quenched with ice water
4. extractionextracted with ethyl acetate
5. washThe organic layer was washed with brine
6. dry with materialdried over anhydrous sodium sulfate
7. customevaporated under reduced pressure
8. customCrude product was purified by column chromatography
9. customto afford free base, which
10. customremoval of the Boc group when ethanolic HCl