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Sodium salts of alkyl sulfide tosylhydrazones 6, 7, and 8 have been pyrolyzed at several temperatures to see if sulfur-carbene interaction would lead to intramolecular sulfur ylide formation of the R2S-4 type. Analysis of the results shows no evidence for sulfur ylide formation but rather «-insertion products typical of singlet carbene reactions producing olefins 9 and 10 and 13 and 15, respectively. Sodium toluenesulfinate was pyrolyzed at 250 and 320°to establish products resulting from its thermal decomposition at these temperatures.

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