Triethylamine → HCID 44178171, compound

Participants

Reaction Steps

A solution of tert-butyl 4-(2-(4-fluorophenyl)-2,3,4,5-tetrahydro-1H-pyrido[4,3-b]indole-8-carboxamido)piperidine-1-carboxylate (Compound 38, 50 mg, 100 μmol) in 4 N HCl/dioxane (3.0 mL) was allowed to stir at room temperature for 2 h. The reaction mixture was then concentrated, MeOH (5.0 mL) was added and the volatiles were evaporated (2×). The resulting residue was dissolved in DMF (2.0 mL) and 4-fluorobenzoyl chloride (15 μL, 20 mg, 130 μmol) and triethylamine (0.5 mL, 0.36 g, 3.6 mmol) were added. The resulting reaction mixture was allowed to stir at room temperature overnight, poured into saturated sodium bicarbonate solution (20 mL) to give a yellow solid which was triturated with ethyl ether and then purified by reverse phase HPLC to provide N-(1-(4-fluorobenzoyl)piperidin-4-yl)-2-(4-fluorophenyl)-2,3,4,5-tetrahydro-1H-pyrido[4,3-b]indole-8-carboxamide (Compound 39) (46%). 1H NMR (DMSO-d6, 300 MHZ) 11.13 (s, 1H), 8.09 (d, J=7.7 Hz, 1H), 8.03 (s, 1H), 7.58 (dd, J=8.4, 1.5 Hz, 1H), 7.45 (dd, J=8.5, 5.5 Hz, 2H), 7.28 (t, J=8.8 Hz, 3H), 7.10 (m, 4H), 4.43 (s, 3H), 4.18-4.03 (m, 2H), 3.70-3.54 (m, 3H), 3.16 (br s, 1H), 2.92 (br s, 2H), 1.87 (br s, 2H), 1.54 (br s, 2H) ppm; MS (ES) 515 (M+H).

Provenance & Evidence