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2005
Thiadiazine derivatives
R 0660
Fused Polycyclic Nitrogen-Containing Heterocycles. Part 9. Synthesis and
Structure of Methyl 3-(2-R-5-Phenylthiazol-4-yl)-7-phenyl16- 147 Molecular
-7H-[1,2,4]triazolo[3,4-b][1,3,4]thiadiazine-6-carboxylates. — Compared to the
most commonly methods used for the synthesis of 1,3,4-thiadiazines, this approach
employs more complex functionally substituted compounds as carbothiohydrazide
components and α-halo ketone, (II) and (III). The structures of thiadiazines (IV) are
confirmed by X-ray analysis. The thiadiazine ring has a distorted unsymmetrical boat
conformation, whereas the thiazole ring in (IV) is planar. Depending on the thiazole
ring substituent, the title carboxylates give rise to the lamellar and cylindrical supramolecular structures in the crystal. — (MAMEDOV, V. A.; MUSTAKIMOVA, L. V.;
GUBAIDULLIN, A. T.; LITVINOV, I. A.; LEVIN, Y. A.; Russ. J. Org. Chem. 40
(2004) 9, 1309-1317; Arbuzov Inst. Org. Phys. Chem., Kazan Res. Cent., Russ. Acad.
Sci., Kazan' 420088, Russia; Eng.) — H. Hoennerscheid
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