- PHASE TRANSFER CATALYSED N-SUBSTITUTION OF 2H-1,2-BENZISOTHIAZOLIN-3-ONE 1,1-DIOXIDE
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The title compound on reaction with alkylating reagents and under the conditions of phase catalysis affords 2-substituted 2H-1,2-benzisothiazolin-3-one 1,1-dioxides (III).The conditions of the reaction and the mass spectra of the products are discussed.
- Svoboda, Jiri,Palecek, Jaroslav,Dedek, Vaclav
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p. 1304 - 1310
(2007/10/02)
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- PERFLUORINATED RESINSULFONIC ACID - A CATALYST FOR CERTAIN ORGANIC REACTIONS.
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The purpose of this work was to examine the possibility of using, as a catalyst in certain organic reactions, the perfluorinated resinsulfonic acid F-4SK in the H form, which is an analog of the perfluorinated resinsulfonic acid Nafion-H. To compare catalyst activity of the perfluorinated resinsulfonic acid in decomposition of cumene hydroperoxide, CHP was also decomposed in presence of KU-2 resin. It was found that during repeated use over a period of 150 h the activity of KU-2 catalyst under analogous conditions fell by 4-6%. During the same time the activity of the perfluorinated resinsulfonic acid remained unchanged. It is also known that the presence of a strong acid in the reaction mixture causes formation of by-products, namely the products of condensation of phenol with acetone and dimethylphenylcarbinol, and of dehydration of dimethylphenylcarbinol, with formation of alpha -methylstyrene and products of greater complexity.
- Etlis,Beshenova,Semenova,Shomina,Dreiman,Balaev
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p. 551 - 555
(2007/10/02)
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