Diisopropylethylamine → HCID 70664841, compound

Participants

Reaction Conditions

Reaction Steps

To a solution of methyl 3-chloro-2-oxo-1,2-dihydroquinoxaline-6-carboxylate (500 mg, crude) in DMSO (5 mL) was added 2-ethylpiperidine (475 mg, 4.20 mmol) and DIEA (542 mg, 4.19 mmol). The resulting solution was stirred overnight at 80° C. in an oil bath and then quenched by the addition of water (50 mL), extracted with dichloromethane (5×20 mL). The organic layers were combined, dried over magnesium sulfate, and concentrated in vacuo to give a residue, which was purified via silica gel column chromatography (1%-10% ethyl acetate in petroleum ether) to afford methyl 3-(2-ethylpiperidin-1-yl)-2-oxo-1,2-dihydroquinoxaline-6-carboxylate as yellow oil (150 mg).

Provenance & Evidence