Sodium hydride → HCID 22396713, compound

Participants

Reaction Steps

tert-Butyl 1,4,5,6-tetrahydroazepino[4,5-b]indole-3(2H)-carboxylate (0.100 g, 0.349 mmol) was dissolved in DMF (1.0 mL) under N2 at rt. NaH (0.0450 g, 1.13 mmol, 3.22 equiv., 60% dispersion) was added and the mixture was stirred at rt for 30 min. 2-Chloro-N,N-dimethylacetamide (86 μL, 0.102 g, 0.838 mmol, 2.4 equiv.) was added, and the reaction mixture was stirred at rt for 24 h. The reaction mixture was poured over ice, then extracted with EtOAc (2×). The organic extracts was washed first with water, then with brine and dried over MgSO4. The organic extracts was filtered and concentrated to yield a crude product (0.148 g). The crude product was chromatographed (SiO2 18 g, eluted with 3:1 toluene:acetone) to give tert-butyl 6-[2-(dimethylamino)-2-oxoethyl]-1,4,5,6-tetrahydroazepino[4,5-b]indole-3(2H)-carboxylate (0.116 g) in 90% yield. 1H NMR (300 MHz, CDCl3) δ 1.50, 2.87-2.95, 3.01, 3.00-3.07, 3.13, 3.68-3.80, 4.85, 7.07-7.19, 7.47-7.51; MS (ESI+) for C21H29N3O3 m/z 372.2 (M+H)+.

Provenance & Evidence