8-Methyl-2-phenylquinoline-3-carboxaldehyde → HCID 67197756, Verbindung

Beteiligte Stoffe

Reaktionsschritte

To a solution of 8-methyl-2-phenylquinoline-3-carboxaldehyde (211 mg, 0.85 mmol) in THF (6 mL) cooled to −78° C. was added methyllithium (1.6N solution in ether, 0.6 mL, 0.93 mmol). After 1 h a further portion of methyllithium (0.2 mL, 0.32 mmol) was added. The reaction was allowed to warm to r.t. before being quenched with water (10 mL). The THF was removed in vacuo and the residue partitioned between DCM (100 mL) and water (30 mL). The organic layer was separated, dried (MgSO4) and concentrated in vacuo. Purification by column chromatography (SiO2, 5-25% EtOAc in heptane) gave the title compound as a white solid (145 mg, 65%). δH (CDCl3) 8.42 (s, 1H), 7.70 (d, J 12 Hz, 1H), 7.60-7.63 (m, 2H), 7.42-7.55 (m, 5H), 5.23-5.31 (m, 1H), 2.80 (s, 3H), 1.87 (d, J 3.6 Hz, 1H), 1.47 (d, J 6.4 Hz, 3H). LCMS (ES+) 264.16 (M+H)+, RT 4.03 minutes (Method 4).

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