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2004
Thiazole derivatives
R 0260
Fused Polycyclic Nitrogen-Containing Heterocycles. Part 7. Friedel—Crafts InCyclization of 5-Phenylthiazole-4-carboxylic Acids — A New Route
44- 140 tramolecular
to Indeno[2,1-d]thiazoles. — Phenylthiazole carboxylic acids (II) are converted into
indenothiazolones (III) by intramolecular acylation according to Friedel—Crafts in the
presence of polyphosphoric acid. The molecular and crystalline structures of pure indenothiazolones (III) are examined by the X-ray diffraction method. Crystal packing
of molecules (III) is determined mainly by π—π interactions. — (MAMEDOV, V. A.;
GUBAIDULLIN, A. T.; NURKHAMETOVA, I. Z.; LITVINOV, I. A.; LEVIN, Y. A.;
Russ. J. Org. Chem. 40 (2004) 4, 534-542; Arbuzov Inst. Org. Phys. Chem., Kazan
Res. Cent., Russ. Acad. Sci., Kazan' 420088, Russia; Eng.) — H. Hoennerscheid
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