Studies on Pyrimidine-annulated Heterocycles: Synthesis and Function of Novel 9-Substituted Cyclohepta[b]pyrimido[5,4-d]furan-8,10(9H)-diones

Abstract

A new short synthesis of 9-substituted cyclohepta[b]pyrimido [5,4 -d]furan-8,10(9H)-diones has been accomplished by the reaction of 3-methyl-, 3butyl-, and 3-phenylbarbituric acids with 2-chlorotropone in an enolate-substitution