Dimethylcarbamoyl Chloride → 2-(Trimethylsilyl)ethyl 4-{4-[(dimethylcarbamoyl)oxy]phenyl}isoquinoline-6-carboxylate

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Reaction Steps

Into dichloromethane (6.5 mL), 2-(trimethylsilyl)ethyl 4-(4-hydroxyphenyl)isoquinoline-6-carboxylate (234 mg, 0.64 mmol) synthesized from 2-(trimethylsilyl)ethyl 4-{[(trifluoromethyl)sulfonyl]oxy}isoquinoline-6-carboxylate by the same method as in Example 8 (8a) was dissolved, to which triethylamine (178 μL, 1.28 mmol), 4-dimethylaminopyridine (23 mg, 0.19 mmol) and N,N-dimethylcarbamoyl chloride (88 μL, 0.96 mmol) were added, followed by stirring at room temperature for three hours. The resulting reaction liquid was concentrated under reduced pressure and the residue thus obtained was purified by silica gel column chromatography (hexane:ethyl acetate, 100:0-50:50, V/V) to give the desired title compound (260 mg, yield 93%).

Provenance & Evidence