Methyl 7-[2-((Z)-3-diethylaminoprop-1-enyl)-4-fluorobenzenesulfonylamino]-4H-furo[2,3-c]chromene-6-carboxylate → HCID 66685618, compound

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Reaction Steps

A solution of methyl 7-[2-((Z)-3-diethylaminoprop-1-enyl)-4-fluorobenzene-sulfonylamino]-4H-furo[2,3-c]chromene-6-carboxylate (Intermediate 4, 0.210 g) in ethanol (6 mL) was added to a flask containing palladium hydroxide (0.020 g) and formic acid (3 drops) under nitrogen. The nitrogen atmosphere was replaced by hydrogen and the mixture was stirred under an atmosphere of hydrogen overnight. The reaction mixture was filtered through Celite and the filtrate was evaporated to dryness. The residue was dissolved in ethyl acetate and washed with 10% aqueous potassium carbonate solution, dried (MgSO4) and filtered. The filtrate was concentrated in vacuo and the residue was purified by chromatography on silica, eluting with a mixture of 2M ammonia in methanol and DCM, with a gradient of 0-10% to give methyl 7-[2-(3-diethylaminopropyl)-4-fluorobenzenesulfonylamino]-4H-furo[2,3-c]chromene-6-carboxylate (0.137 g).

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