Potassium Carbonate → 1-Bromo-4-hydroxy-7-phenylsulfanyl-isoquinoline-3-carboxylic acid methyl ester

Participants

Reaction Steps

1-Bromo-4-hydroxy-7-phenylsulfanyl-isoquinoline-3-carboxylic acid (10.0 g), potassium carbonate (3.7 g) and methyl sulfate (3.4 g) were suspended in 500 ml acetone and stirred at reflux overnight. Reaction mixture was concentrated and residue partitioned between 1 N hydrochloric acid and ethyl acetate. Organic layer was dried over magnesium sulfate and filtered. Filtrate concentrated to give title compound (9.6 g). MS-(+)-ion M+1=389.9, 391.9.

Provenance & Evidence