Acetic Anhydride → HCID 18385718, compound

Participants

Reaction Steps

150 mg of 5-{4-(aminosulfonyl)-3-chlorophenyl}-2,2-dimethyl-4-phenyl-3(2furanone (Example 367) in 10 ml dichloromethane was reacted with 0.3 ml acetic anhydride in the presence of 0.5 ml triethylamine and 15 mg of 4-(N,N-dimethylamino)pyridine at room temperature for 12 hours. The reaction mixture was concentrated in vacuo, which was followed by extraction with 30 ml water and dichloromethane (30 ml×3). The organic layer was concentrated under reduced pressure and then was purified by column chromatography (hexane/ethylacetate 2:1) to afford 113 mg of 5-[4-{(acetylamino)sulfonyl}-3-chlorophenyl]-2,2-dimethyl-4-phenyl-3(2H)-furanone as a solid. mp: 194-195° C. NMR: δ1.57 (s, 6H), 2.10 (s, 3H), 7.27 (m, 2H), 7.40 (m, 3H), 7.68 (dd, J=8.4, 1.8 Hz, 1H), 7.85 (d, J=1.5 Hz, 1H), 8.18 (d, J=8.1 Hz, 1H), 8.45 (br s, 1H). IR (cm−1): 3195, 3104, 1698, 1377, 1164.

Provenance & Evidence