- OXIDATION OF 1,4-DICHLORO-2-BUTENE BY AQUEOUS SODIUM HYPOCHLORITE UNDER PHASE TRANSFER CONDITIONS
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The oxidation of 1,4-dichloro-2-butene by aqueous sodium hypochlorite was studied.A sharp increase in the reaction rate was found in the presence of phase transfer catalysts and surfactants.The involvement of oxygen as a cooxidant and the effect of surfactants on the absorption of atmospheric oxygen by the reaction system were demonstrated.
- Grigoryan, G. S.,Karoyan, I. L.,Malkhasyan, A. Ts.,Martirosyan, G. T.,Artamkina, G. A.,Beletskaya, I. P.
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p. 1039 - 1042
(2007/10/02)
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- Lithium or Bromomagnesium 1,4- and 1,5-Dilithioalkan-2-yloxides: Preparation and Synthetic Applications
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Treatment of chloromethyl 2- or 3-chloroalkyl carbinols with butyllithium and then lithium naphthalenide or with ethylmagnesium bromide and then powdered lithium leads to the formation of lithium or bromomagnesium dilithiothioalkoxides, respectively, which represent trianionic species.The bromomagnesium 1,ω-dilithio-2-alkoxides undergo immediate elimination of lithium bromide and magnesium oxide to give ω-lithio-1-alkenes.These latter organometallic compounds as well as the lithium dithioalkoxides react with various electrophiles to afford functionalized compounds.
- Barluenga, Jose,Fernandez, Jose R.,Yus, Miguel
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p. 977 - 979
(2007/10/02)
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- Benzhydrylpiperozinyl thiazole derivatives and pharmaceutical composition comprising the same
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Benzhydrylpiperazinyl Thiazole compounds of the formula STR1 wherein R1 is hydrogen, amino, or mono- or di- substituted amino, in which the substituent is selected from lower alkyl, acyl and di(lower)alkylaminomethylene, R2 is hydrogen, halogen, lower alkyl or aryl, R3 is ar(lower)alkyl optionally substituted by halogen, A is lower alkylene optionally interrupted by a sulfur atom, and Y is C1 -C3 alkylene, having antiallergic activity.
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