Pyrrolophenoxathiin dioxides. 1. Synthesis of 3H-pyrrolo[2,3-c]phenoxathiin 11,11-dioxide and 1h-pyrrolo[3,2-b]phenoxathiin 10,10, dioxide by the fischer reaction
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Cyclization of the 2 phenoxathiin 10,10-dioxide hydrazone of ethyl pyruvate in ethyl polyphosphate results in the concurrent formation of the respective cyclic esters of both angular and linear structures. The parent compounds of a new condensed heterocyclic system of pyrrolophenoxathiin dioxides are synthesized from the latter.
KeywordsEster Dioxide Ethyl Organic Chemistry Pyruvate
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