Enolethers. XXI. Synthesis of 5, 5′??disubstituted 4, 4′??bipyrimidines

F Effenberger, I Barthelmess

Index: Effenberger; Barthelmess Journal of Heterocyclic Chemistry, 1995 , vol. 32, # 2 p. 599 - 602

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Citation Number: 4

Abstract

Abstract 1, 6-Dialkoxy-3, 4-diones 3 are easily accessible by acylation of enol ethers 1 with oxalyl chloride and subsequent elimination of hydrogen chloride using triethylamine. The open-chain 2, 5-dimethyl derivative 3b is converted with amidines 4a-c and S-