p-Toluenesulfonic acid → HCID 118037309, compound

Participants

Reaction Conditions

Reaction Steps

A microwave vessel was charged with a solution of 2,4-dichloro-6,7-dihydro-5H-cyclopenta[b]pyridine (0.165 g, 0.88 mmol) in ethanol (3 mL). p-Toluenesulfonic acid (0.167 g, 0.88 mmol) and ethyl 2-(4-aminophenyl)acetate (0.157 g, 0.88 mmol) were added and the vessel was sealed with an aluminum cap. The mixture was heated to 120° C. for 2 d, cooled, diluted with satd. aq. sodium bicarbonate, and extracted with ethyl acetate. The combined organic layer was dried over anhydrous sodium sulfate, filtered, and the filtrate was concentrated. The residue was purified by column chromatography (silica, hexanes/ethyl acetate) to afford the title compound (0.160 g, 55%) as an orange oil. MW=330.81. 1H NMR (CDCl3, 500 MHz) δ 7.33-7.28 (m, 2H) 7.16-7.12 (m, 2H), 6.74 (s, 1H), 5.73 (s, 1H), 4.18 (q, J=7.0 Hz, 2H), 3.62 (s, 2H), 2.98 (t, J=7.5 Hz, 2H), 2.76 (t, J=7.5 Hz, 2H), 2.18 (quin, J=7.5 Hz, 2H), 1.28 (t, J=7.0 Hz, 3H); APCI MS m/z 331 [M+H]+.

Provenance & Evidence