Hydrochloric Acid → 6-Acetyl-4,4-dimethyl-3,4-dihydroquinolin-2(1H)-one

Participants

Reaction Conditions

Reaction Steps

A solution of 6-bromo-4,4-dimethyl-3,4-dihydro-1H-quinolin-2-one (Intermediate 4, 270 mg, 1.06 mmol) in 5 ml of THF was first degassed by bubbling with argon for 30 min. Tributyl(1-ethoxyvinyl)tin (766 mg, 2.12 mmol) and PdCl2(PPh3)2 (37mg, 0.05 mmol) were added. After stirring at 80° C. for 18 h, the mixture was cooled to room temperature and 3 mL of 10% HCl was added. The mixture was then stirred for another 30 min before extracted with ethyl acetate (3×10 mL). The combined organic layer was washed with brine (1×10 mL), dried (MgSO4) and concentrated at reduced pressure. Purification by flash chormatography (50:50 hexane/ethyl acetate) yielded the title compound as a white solid (154 mg, 67% yield).

Provenance & Evidence