Transformations of phenylhydrazones of d
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David Bevk; Jurij Svete; Branko Stanovnik
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Article
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2005
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Journal of Heterocyclic Chemistry
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English
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The hydrazones 3a,b, prepared from phenylhydrazine (1) and dialkyl 2-oxopropane-1,3-dicarboxylate (2a,b) were converted in concentrated sulfuric acid at -5 ยฐC into a mixture of alkyl (3-carboxyindol-2yl)acetates (5a,b), and ethyl (5-ethoxy-1-phenyl-1H-pyrazol-3-yl)acetate 6. The hydrazone 8, prepare