Hydrochloric Acid → Methyl 4-(3-(tert-butylamino)-2-methylquinoxalin-5-yl)-2-(cyclopropanecarbonyl)-4-oxobutanoate

Participants

Reaction Steps

A mixture of 2-bromo-1-(3-(tert-butylamino)-2-methylquinoxalin-5-yl)ethanone (606) (0.27 g, 0.803 mmol), methyl 3-cyclopropyl-3-oxopropanoate (Accela ChemBio, 0.114 mL, 0.803 mmol), K2CO3 (EMD, 0.333 g, 2.409 mmol), in DMF (3.21 ml) was combined and stirred overnight at RT. Reaction mixture was diluted with DCM and water. The aqueous layer was acidified with 1 N HCl solution and back extracted with DCM. The organic layers were combined and washed with water and brine to remove DMF. Volatile solvents were removed by rotovap. The product methyl 4-(3-(tert-butylamino)-2-methylquinoxalin-5-yl)-2-(cyclopropanecarbonyl)-4-oxobutanoate (418a) was advanced to next step. m/z (ESI, +ve) 398.1 (M+H).

Provenance & Evidence