Hydrochloric Acid → 6-((4-(4-cyano-5-(dicyanomethylene)-1-hexyl-2-oxo-2,5-dihydro-1H-pyrrol-3-yl)phenyl)(2-ethylhexyl)amino)hexanoic acid

Participants

Reaction Steps

The prepared methyl 6-((4-(4-cyano-5-(dicyanomethylene)-1-hexyl-2-oxo-2,5-dihydro-1H-pyrrol-3-yl)phenyl)(2-ethylhexyl)amino)hexanoate (7.5 g, 12.8 mmol) and tetrahydrofuran (50 ml) were loaded into a flask and stirred. Hydrochloric acid (20 ml, 3 N) was added thereto, and the mixture was allowed to react at 65° C. for 24 hours with stirring. The reaction product was transferred into a separate funnel, and was then added with water and dichloromethane, after which the organic layer was isolated therefrom, dehydrated using sodium sulfate, and then distilled under reduced pressure. Subsequently, the obtained material was separated through silica column chromatography, thus obtaining 6.4 g of a dark blue solid.

Provenance & Evidence