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2005
Thiazine derivatives
R 0610
2-(2-Aryl-2-oxoethyl)-4H-benzo-1,4-thiazin-3-ones as Products of the Reaction of
with β-Aroylacrylic Acids. — Reaction of 2-aminothiophenol
07- 156 2-Aminothiophenol
(I) with β-aroylacrylic acids (II) leads to title compounds (III) in good yields. Reaction
of (I) with acrylic acids (II), generated in situ by treatment of dibromopropionic acids
(IV) with triethylamine, provides the target compounds (III) in significantly lower
yields. Reaction of (I) with dibromopropionic acids (IV) in the absence of triethylamine
affords dimeric benzothiazinones (V) as by-products. — (BERYOZKINA, T. V.;
KOLOS, N. N.; ORLOV*, V. D.; ZUBATYUK, R. I.; SHISHKIN, O. V.;
Phosphorus, Sulfur Silicon Relat. Elem. 179 (2004) 10, 2153-2162; Dep. Org. Chem.,
V. N. Karazin Natl. Univ., Kharkov 61077, Ukraine; Eng.) — R. Langenstrassen
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