Abstract
Xanthotoxin, bergapten, and visnagin sulfonyl chlorides have been reacted with diamines, hydrazine, amino acides, and imidazolidineiminothiones to produce the corresponding mono-, bis-sulfonamide, and tosylamino acid derivatives. Interaction of xanthotoxin-4-sulfonyl chloride with thiohydantoin furnished the respective thiosulfonic ester. The new products exhibited better antibacterial and antifungal activities.