Masoumi M, Bayat M, Hosseini FS. One-pot multi-component synthesis of new bis-pyridopyrimidine and bis-pyrimidoquinolone derivatives.
Heliyon 2020;
6:e05047. [PMID:
33033771 PMCID:
PMC7536303 DOI:
10.1016/j.heliyon.2020.e05047]
[Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/01/2020] [Revised: 05/29/2020] [Accepted: 09/21/2020] [Indexed: 01/12/2023] Open
Abstract
A variety of bis-heterocycles such as bis(pyrimido[4,5-b]quinolone), bis(chromeno[3′,4':5,6]pyrido[2,3-d]pyrimidine), bis(pyrido[2,3-d:6,5-d']dipyrimidine), and bis(benzo[g]pyrimido[4,5-b]quinolone) derivatives were synthesized via one-pot, multi-component reaction of various 6-aminouracils or 6-aminothiouracils, terephthalaldehyde, and CH-acids such as 4-hydroxycoumarin, dimedone, 2-hydroxy-1,4-naphthoquinone, barbituric acid, and thiobarbituric acid in EtOH as a solvent at reflux. The mild conditions, fast rate of reaction, absence of catalyst, different functional group compatibility, simple operation and work-up involving no chromatographic process, are worth mentioning.
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