- Nitro derivatives of cyclic sulfoximides of the 1,2-benzoisothiazole series
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Nitro derivatives of 1-R-1,2-benzoisothiazol-3-one 1-oxide were synthesized by the reactions of 2-alkyl(phenyl)thio-4-nitro- and 4,6-dinitro-2-(phenylthio)benzamides with chlorine in 60% acetic acid. Analogous reactions of 2-(n-butylthio)-4-nitro- and 2-(tert-butylthio)-4-nitrobenzamides with chlorine afforded 2-butyl- and 2-H-1,2-benzoisothiazol-3-one 1-oxides, respectively. The proposed reaction mechanism includes the formation and subsequent transformations of S-alkyl-S-aryl- and S,S-diarylchlorosulfonium chlorides.
- Serebryakov,Zlotin
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p. 1549 - 1555
(2007/10/03)
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- EFFECT OF THE STRUCTURE OF CARBOXYLIC ACIDS ON THEIR CATALYTIC ACTIVITY IN THE ALCOHOLYSIS OF CARBOXYLIC ACID CHLORIDES BY 1-BUTANOL IN TOLUENE
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The kinetics of the reactions of butyryl chloride with 1-butanol in toluene, catalyzed by trimethylacetic, acetic, and monochloro- and trichloroacetic acids, were studied.It was shown that these acids hardly differ at all in catalytic activity, and the Taft constant was ρ* 0.The obtained data are compared with those for the alcoholysis of 3,5-dinitrobenzoyl chloride and trichloroacetyl chloride and also for certain aminolysis reactions.Details of the mechanism of bifunctional catalysis are amplified.
- Semenyuk, G. V.,Oleinik, N. M.,Razumova, N. G.,Zhil'tsov, N. P.
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p. 1225 - 1231
(2007/10/02)
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