Pyridine → HCID 23051912, compound

Participants

Reaction Steps

A solution of 1-butoxy-2-(3-hydroxypropylamino)-1-cyclobutene-3,4-dione [prepared in Example 7] (1.14 g, 5.0 mmol) and pyridine (0.65 mL, 8.0 mmol) in 6.0 mL of dichloromethane cooled to 0° C. was treated dropwise with benzenesulfonyl chloride (0.65 mL, 5.1 mmol). The mixture was stirred at ambient temperature for 3 hours, then washed with water (4 times), dried and evaporated under reduced pressure to give 1.53 g (83% yield) of title compound which was used without purification in the subsequent reaction.

Provenance & Evidence