Abstract: Carbon subsulfide, prepared by pyrolytic reduction of carbon disulfide,
reacts with 6-chloro-4-hydroxycoumarin and thiobenzamide to yield the polythiopyrones
and thiazinethiones 5, 6 and 7. 2-Mercaptopyridine and carbon subsulfide
give the mesoionic compound 8. Generally it can be shown that carbon subsulfide reacts to
give higher fused products.
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