Abstract
The interaction of ethyl propiolate with 4,4-dimethyl-4,5-dihydro-2,3-dithiolo[3,4-c]quinoline-1-thiones leads to 1,3-dithiol-2-ylidenes, 1,6,6a(l4)-trithiapentalene, or thiino[2,3-c]quinolines depending on the conditions.
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Medvedeva, S.M., Shikhaliev, K.S., Ermolova, G.I. et al. 1,3-Dipolar Cycloaddition of Ethyl Propiolate to 4,4-Dimethyl-4,5-dihydro-1,2-dithiolo-[5,4-c]quinoline-1-thiones. Chemistry of Heterocyclic Compounds 38, 918–921 (2002). https://doi.org/10.1023/A:1020913328392
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DOI: https://doi.org/10.1023/A:1020913328392