2-Bromothiophene → HCID 67378757, 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), 2-bromothiophene (0.347 mL, 4 mmol), K3PO4 (0.848 g, 4 mmol), CuI (38 mg, 0.2 mmol) and L-Proline (46 mg, 0.39 mmol) in dry DMF (6 mL) was stirred at 150° C. for 16 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 reverse phase HPLC to yield 2,8-dimethyl-5-thiophen-2-yl-2,3,4,5-tetrahydro-1H-pyrido[4,3-b]indole (20 mg). 1H NMR (TFA salt, CD3OD) δ (ppm): 7.50 (d, 1H), 7.30 (s, 1H), 7.15 (m, 3H), 7.05 (d, 1H), 4.78 (m, 1H), 4.39 (m, 1H), 3.80 (m, 1H), 3.58 (m, 1H), 3.15 (s, 3H), 3.05 (m, 2H), 2.42 (s, 3H).

Provenance & Evidence