Potassium Carbonate → HCID 89499550, compound

Participants

Reaction Steps

A mixture of the compound 4-bromo-1,7-dimethoxy-3-(4-methoxyphenyl)isoquinoline (compound 26) (187 mg, 0.5 mmol), potassium (trimethylsilyl)ethynyltrifluoroborate (133 mg, 0.65 mmol), palladium diacetate (3.5 mg, 0.015 mmol), RuPhos (14 mg, 0.03 mmol) and potassium carbonate (318 mg, 1.5 mmol) dissolved in 2 mL of a distilled THF/degassed H2O mixture (10/1) is refluxed under argon for 2 hours. The reaction medium is filtered on silica then condensed under vacuum. The crude is purified on a silica column (cyclohexane/dichloromethane, 7/3). 182 mg (93%) of the 1,7-dimethoxy-3-(4-methoxyphenyl)-4-((trimethylsilyl)ethynyl)isoquinoline intermediate is obtained in the form of a brown solid which is used directly in the following stage,

Provenance & Evidence