[KSCI] Korea Science Citation Index Service

http://dx.doi.org/10.5012/bkcs.2002.23.4.567

New Fused Quinoxalines : Synthesis and Reactions of Pyrimidothienoquinoxaline and Oxadizolylthienoquinoxalines

Moustafa, Osama S.
Badr, Mahmoud Z.A.
El-Emary, Talaat I.

Publication Information

Bulletin of the Korean Chemical Society / v.23, no.4, 2002 , pp. 567-570 More about this Journal

Abstract

Diazotization of 3-amino-2-ethoxycarbonylthieno[2,3-b]quinoxaline 1 gave the diazonium salt 2 which was reacted with SO2 and N-methylaniline to give sulfamoylquinoxaline derivatives 3-5. Imidazothienoquinoxaline 8 was obtained from the reaction of carboxylic acid hydrazide 6 with nitrous acid and followed by boilling the carboazide 7 in dry xylene. Also, compound 6 react with CH(OEt)3 to give aminopyrimidine 9 which was reacted with arylidene malonodinitrile, furfural and/or dimethoxy-tetrahydrofuran to afford compounds 10, 11 and/or 12 respectively. Refluxing of 6 with CS2 gave oxadiazolylthienoquinoxaline 13, reaction of 13 with hyrazine hydrate, CH(OEt)3, nitrous acid, CS2 and a-halocompounds to give 14-19.

Keywords

Synthesis; Diazotization; Heterocycles; Pyrimidothienoquinoxalines;

Citations & Related Records

Times Cited By Web Of Science : 8 (Related Records In Web of Science)
Times Cited By SCOPUS : 9

Reference
Cited By SCOPUS

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1	/ Russian Chemical Bulletin
2	/ Progress in Heterocyclic Chemistry
3	/ Journal of Molecular Graphics and Modelling
4	/ Journal of the Chinese Chemical Society
5	/ Journal of the Chinese Chemical Society
6	/ Phosphorus, Sulfur and Silicon and the Related Elements
7	/ Journal of the Chinese Chemical Society
8	/ Phosphorus, Sulfur and Silicon and the Related Elements
9	/ Advances in Heterocyclic Chemistry