HCID 65470943, compound → HCID 24957483, compound

Participants

Reaction Conditions

Reaction Steps

n-Butyl lithium (4.2 mL, 10.54 mmol, 2.5 M solution in hexane) was added slowly to a solution of 2,4-dimethoxy-6-methyl benzamide (958 mg, 4.58 mmol) in THF (30 mL) under nitrogen with cooling (ice-salt bath), maintaining the temperature below 20° C. After completion of the addition, the mixture was stirred for 1 h at 0° C., then cooled to −50° C. and a solution of 4-(2-dimethylaminoethoxy)-3,5-dimethyl benzonitrile (1.1 g, 5.04 mmol) (the B-ring building block) in THF (10 mL) was added quickly. The cooling bath was removed and the reaction mixture was allowed to warm to room temperature and stirred for 16 h at room temperature. A saturated NH4Cl solution was added with cooling and the layers were separated. The organic layer was washed with water, brine, dried over Na2SO4 and concentrated to give crude product. The crude product was purified by chromatography to give 3-(4-(2-(dimethylamino)ethoxy)-3,5-dimethylphenyl)-6,8-dimethoxyisoquinolin-1(2H)-one (162 mg, 8%) as a hydrochloride. Selected data: MS (ES) m/z: 397.06; MP 261-263° C. at decomposition (HCl).

Provenance & Evidence