Ethylamine → 2-(Ethylamino)-6-methoxyquinoline-3-carbaldehyde

Participants

Reaction Conditions

Reaction Steps

To a stirred solution of 2-chloro-6-methoxyquinoline-3-carbaldehyde (1.51 g, 6.80 mmol) in THF (10 mL) in a 20 mL microwave vial equipped with a magnetic stirrer was added ethylamine (2 M in THF, 33.8 mL, 67.6 mmol) and the mixture was stirred at 160° C. for 6 h under microwave irradiation. After cooling to RT, the volatiles were removed under vacuum at 40° C. and the resulting yellow oil was taken up in a mixture of THF:1 N aq. HCl=1:1 (50 mL) and stirred for 15 min at RT. THF was removed at 40° C. under vacuum and the residue was then neutralised with a saturated NaHCO3 aqueous solution before to be extracted with CH2Cl2 (100 mL). The organic phase was washed with brine (20 mL), dried over MgSO4, filtered, and concentrated at 40° C. under vacuum to give 2-(ethylamino)-6-methoxyquinoline-3-carbaldehyde SLA 28162 as an orange oil (1.19 g, 76% yield).

Provenance & Evidence