1-(1-Ethylpiperazin-4-yl)-3-bromoisoquinoline → HCID 22502478, compound

Participants

Reaction Steps

(4-Tributylstannylphenyl) (3-methoxypropyl)sulfone (1.70 g) and 3-bromo-1-(4-ethylpiperazin-1-yl)isoquinoline (0.93 g) were heated under reflux in the presence of tetrakistriphenylphosphinepalladium(0) (0.20 g) in xylene in nitrogen atmosphere for 1 day. After cooling, the reaction solution was diluted with ethyl acetate and filtered. The filtrate was extracted with 2N hydrochloric acid, and the resulting aqueous layer was washed with ethyl acetate and adjusted to pH 10 with a 8N aqueous solution of sodium hydroxide, which was then extracted with ethyl acetate, washed with a 10% aqueous solution of sodium carbonate and brine, and dried over magnesium sulfate. The solvent was evaporated, and the resulting residue was purified by silica gel column chromatography (chloroform/methanol system), to give 0.87 g of the free compound of the title compound as a pale brown amorphous.

Provenance & Evidence