Synthesis of Mono- and Bis-chlorosulfonylarylpyrones and Related Sulfonates and Sulfonamides

New 2,6-bis[(3-chlorosulfonyl-4-methyl)phenyl]-4H-pyran-4-one and 2-[(3-chlorosulfonyl-4-methyl)phenyl]-6-methyl-4H-pyran-4-one were synthesized by means of a reaction of chlorosulfonic acid with corresponding pyrones at 0→50°C and were treated with various alcohols and primary and secondary alkyl and aryl amines to give the corresponding sulfonates 4a–e in 20–49% and sulfonamides 3a–l in 55–82% yields. GRAPHICAL ABSTRACT