Abstract: The preparation of 5-sulfonamido-8-hydroxy-1,6-naphthyridine-7-carboxamides is disclosed. A 5-halo-8-hydroxy-1,6-napthyridine-7-carboxylic acid or acid ester in which the hydroxy is derivatized with a protecting group is reacted with a sulfonamide (e.g., an alkanesulfonamide, N-alkyl alkanesulfonamide, or alkanesultam) in the presence of a copper promoter and a chelating agent, followed by deprotection of the hydroxy group, and then coupling with an amine to obtain the 5-sulfonamido-8-hydroxy-1,6-naphthyridine-7-carboxamide. Alternatively, the hydroxy-protected 5-halo-8-hydroxy-1,6-napthyridine-7-carboxylic acid (or ester) is first coupled with an amine, the resulting carboxamide reacted with a sulfonamide followed by deprotection of the hydroxy group to obtain the 5-sulfonamido-8-hydroxy-1,6-naphthyridine-7-carboxamide.

Abstract: The present invention is concerned with a novel process for the preparation of a compound of the formula: ##STR1## This compound is useful as an intermediate in the synthesis of compounds which possess pharmacological activity.

Abstract: Propargylic and allenic sulfones are disclosed having the ability to selectively cleave nucleic acids, especially deoxyribonucleic acid. Such compositions are capable of being synthetically modified to effect cleavage at selected, sequenced sites on nucleic acids.