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Paper | Regular issue | Vol 31, No. 1, 1990, pp.31-36
Published online, 1st January, 1970
DOI: 10.3987/COM-89-5027
Studies in Spiroheterocycles: Part XXII: Synthesis of Novel Fluorine Containing Spiro[3H-indole-3,5’-(5H)pyrano[2,3-d]pyrimidine]-6’-carbonitriles and Ethyl Carboxylates

Krishna C. Joshi,* Renuka Jain, and Saroj Nishith

*Department of Chemistry, University of Rajasthan, Jaipur 302 004, India

Abstract

A number of novel fluorine containing spiro[3H-indole-3,5’-(5H)-pyrano[2,3-d]pyrimidine]-6’-carbonitriles and ethyl carboxylates have been synthesized by the Michael reaction of 3-dicyano- and carboethoxycyanomethylene-2-oxindole with phenylbarbituric acid. As the reaction offers two possibilities, the formation of the pereferred product has been discussed. Further, the spiro compounds have been subjected to acetylation and methylation.