Toluene → HCID 59859868, compound

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A solution of (4-tert-butyl-phenyl)-propynoic acid ethyl ester (0.23 g, 1.0 mmol) and 3-aminoquinoline (0.144 g, 1.0 mmol) in 1,2-dichloroethane (15 mL) was treated with a 2N solution of trimethylaluminum in toluene (0.75 mL, 1.5 mmol). The resultant solution was stirred at room temperature for 15 minutes, then heated at reflux for 18 h. The solution was cooled and treated with methanol (0.50 mL). The product was preabsorbed onto silica gel and purified by flash chromatography, using a gradient of methanol in dichloromethane as the eluant. The product was isolated, after trituration in diethyl ether, as a colorless solid, 0.17 g (52%). MS: m/z 329.2 (MH+). 1HNMR (DMSO-d6): δ 1.31 (s, 9 H), 7.54-7.72 (m, 6 H), 7.97 (d, 1 H), 8.72 (d, 1 H), 8.96 (d, 1 H) and 11.3 (s, 1 H).

Provenance & Evidence