Benzylamine → HCID 44138603, compound

Participants

Reaction Conditions

Reaction Steps

To a stirred solution of 2-chloro-6-methoxyquinoline-3-carbaldehyde (2.00 g, 9.02 mmol) in THF (10 mL) in a 20 mL microwave vial equipped with a magnetic stirrer was added benzylamine (4.88 mL, 90.20 mmol) and the reaction mixture was stirred for 1.5 h at 160° C. then 45 min at 180° C. under microwave irradiation. After cooling to RT, the volatiles were removed at 40° C. under vacuum and the resulting yellow oil was taken up in a mixture of THF:1 N aq. HCl=1:1 (50 mL) and stirred for 1 h at RT. The volatiles were then removed at 40° C. under vacuum and the residue was then neutralised with a saturated NaHCO3 aqueous solution before extraction with CH2Cl2 (100 mL). The organic phase was washed with brine (20 mL), dried over MgSO4, filtered and concentrated at 40° C. under vacuum. Purification by column chromatography (SiO2, eluent cyclohexane:EtOAc=100:0 to 75:25) provided a mixture of the desired product and its benzyl imine derivative. This mixture was taken up in a mixture of THF:1 N aq. HCl=1:1 (20 mL) and stirred for 2 h at RT. The volatiles were then removed at 40° C. under vacuum and the residue was then neutralised with a saturated NaHCO3 aqueous solution before extraction with CH2Cl2 (100 mL). The organic phase was washed with brine (20 mL), dried over MgSO4, filtered and concentrated at 40° C. under vacuum. Purification by column chromatography (SiO2, eluent cyclohexane:EtOAc=100:0 to 75:25) gave, after evaporation and drying, 2-(benzylamino)-6-methoxyquinoline-3-carbaldehyde SLA 41002 as a yellow solid (0.431 g, 16% yield).

Provenance & Evidence