2-Aminobenzenesulfonamide → 1,1-Dibutyl-3-(1,1-dioxido-4h-1,2,4-benzothiadiazin-3-yl)-6-fluoro-4-hydroxynaphthalen-2(1h)-one

Participants

Reaction Steps

A suspension of the compound of Example 18G (39 mg, 0.10 mmol) and 2-aminobenzenesulfonamide (17 mg, 0.10 mmol) in toluene (1 mL) was warmed at reflux for 2 h. The solution was cooled and concentrated in vacuo to afford a yellow foam which was purified by flash chromatography eluting with ethyl acetate in hexane to afford the title compound (33 mg, 0.07 mmol).

Provenance & Evidence