Abstract
Reactions of nitrile, amide or ester of 5-amino-3-thioxo-3H-1,2-dithiole-4-carboxylic acid 1 with alkylation and acylation agents were studied. "Ionic" 1,2-dithiole amides 6 were formed in several ways. Treatment with phosphorus pentasulfide afforded the corresponding 3,3aλ4,4-trithia-1-azapentalenes 7. Structures of the synthesized heterocycles were studied using a combination of X-ray analysis, IR spectroscopy, and HF and DFT quantum-chemical calculations.
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