Synthesis and properties of 2-(2-oxoindolin-3-ylidene)-2-cyanoacetic acid piperidides and morpholides

The reaction of isatins with cyanoacetic acid piperidide or morpholide gives the corresponding derivatives of 2-(2-oxoindolin-3-ylidene)-2-cyanoacetic acid, which may be reduced to give amides of 2-(2-oxoindolin-3-yl)-2-cyanoacetic acid and react with ethanolic alkali to give quinoline derivatives.Translated from Khimiya Geterotsiklicheskikh Soedinenii, No.12, pp. 1611–1613, December 1992.