Potassium Phosphate, Tribasic → HCID 53372879, compound

Participants

Reaction Steps

A solution of 2,8-dimethyl-2,3,4,5-tetrahydro-1H-pyrido[4,3-b]indole (0.4 g, 2 mmol), 5-bromo-2-trifluoromethyl-pyridine (1.356 g, 6 mmol), K3PO4 (1.272 g, 6 mmol), CuI (38 mg, 0.2 mmol) and L-Proline (70 mg, 0.4 mmol) in dry DMF (5 mL) was stirred at 150° C. for 4 h. The reaction mixture was diluted with water and extracted with EtOAc. The organic layer was dried over anhydrous sodium sulfate and concentrated under reduced pressure to afford crude material, which was purified by column chromatography using silica (100-200 mesh) and 3% MeOH:DCM to yield 2,8-dimethyl-5-(6-trifluoromethyl-pyridin-3-yl)-2,3,4,5-tetrahydro-1H-pyrido[4,3-b]indole as an off white solid (150 mg). 1H NMR (HCl salt, CD3OD) d (ppm): 8.85 (s, 1H), 8.2 (d, 1H), 8.1 (d, 1H), 7.4 (s, 1H), 7.2 (d, 1H), 7.1 (d, 1H), 4.8 (m, 1H), 4.4 (m, 1H), 3.9-3.85 (m, 1H), 3.6-3.59 (m, 1H), 3.25-3.2 (m, 1H), 3.2 (s, 3H), 3.1-3.0 (m, 1H), 2.41 (s, 3H).

Provenance & Evidence