Synthesis 2014; 46(02): 258-262
DOI: 10.1055/s-0033-1340085
paper
© Georg Thieme Verlag Stuttgart · New York

Multicomponent Synthesis of Novel Penta-Heterocyclic Ring Systems Incorporating a Benzopyranopyridine Scaffold

Sobhi M. Gomha
Department of Chemistry, Faculty of Science, University of Cairo, Giza, 12613, Egypt   Fax: 20(2)35676501   eMail: riyadh1993@hotmail.com
,
Sayed M. Riyadh*
Department of Chemistry, Faculty of Science, University of Cairo, Giza, 12613, Egypt   Fax: 20(2)35676501   eMail: riyadh1993@hotmail.com
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Publikationsverlauf

Received: 02. September 2013

Accepted after revision: 10. Oktober 2013

Publikationsdatum:
07. November 2013 (online)


Abstract

A simple one-pot method is reported for the synthesis of several novel series of chromeno[4′,3′:4,5]pyrido[2,3-d][1,2,4]triazolo[4,3-a]pyrimidine-6,14-diones, chromeno[4′,3′:4,5]pyr­ido[2,3-d]thiazolo[3,2-a]pyrimidine-6,14-diones, and chrom-­eno[4′′,3′′:4′,5′]pyrido[2′,3′:4,5]pyrimido[2,1-b][1,3]thiazine-6,15-dione by a multicomponent reaction of salicylaldehyde, ethyl acetoacetate, and the appropriate fused heterocyclic amines in refluxing glacial acetic acid. The structures of the newly synthesized compounds were established by spectroscopy and elemental analyses. The mechanism of the single-step reaction was elucidated.

Supporting Information

 
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