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ISSUE 12

Year 2007, Month 12 (Section Full Articles, Page 2471)

Polyfused nitrogen-containing heterocycles 18.* 2´-Amino-5-methyl-1,2,3,4,4´,5´-hexàhydrospiro[quinoxaline-2,4´-thiazol]-3-ones. Synthesis, structure, and recyclization

V. A. Mamedov, A. A. Kalinin, A. T. Gubaidullin, and I. A. Litvinov

Bis-3-(α-bromoethyl)quinoxalin-2-ones with 3-oxapentane or 3,6-dioxaoctane spacer binding two heterocyclic fragments react with thiourea to give the corresponding bis-spirothiazolîquinoxalines, which upon treatment with acetic anhydride can be converted to podands with terminal thiazolîannulated quinoxaline fragments. X-Ray data for 2´-amino-4-ethyl-5methyl-1,2,3,4,4´,5´-hexàhydrospiro[quinoxaline-2,4´-thiazol]-3-one indicate for this compound a potentiality to form clathrate structures with various solvate molecules.

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