Sodium t-butoxide → N-{[3-(Dibenzylamino)oxetan-3-yl]methyl}-2-(1,1-dioxido-8-phenoxy-2,3-dihydro-1,4-benzothiazepin-4(5H)-yl)-6-methylquinolin-4-amine

Participants

Reaction Conditions

Reaction Steps

A mixture solution of 4-(4-chloro-6-methylquinolin-2-yl)-8-phenoxy-2,3,4,5-tetrahydro-1,4-benzothiazepine 1,1-dioxide (167.0 mg, 0.36 mmol), (3-(aminomethyl)-N,N-dibenzyloxetan-3-amine (609.0 mg, 2.16 mmol), 1,1′-bis(diphenylphosphino)-ferrocenedichloropalladium(II) (15.0 mg, 0.02 mmol), 1,1′-bis(diphenylphosphino)-ferrocene (11.2 mg, 0.02 mmol) and sodium tert-butoxide (75.0 mg, 0.72 mmol) in 1,4-dioxane (2.0 mL) was heated with stirring at 120° C. for 2 hours under microwave irridiation. After being cooled to room temperature, the reaction mixture was extracted with ethyl acetate (100 mL). The organic layer was washed with brine (50 mL×2), dried over anhydrous sodium sulfate and concentrated in vacuo. The residue was purified by ISCO combi-flash chromatography (gradient elution, 20-60% ethyl acetate in petroleum ether) to afford 134.6 mg of the desired product as a light yellow solid (yield was 52.6%). MS obsd. (ESI+) [(M+H)+] 711.

Provenance & Evidence