- Synthesis and epoxidation of 1,3-, 1,4-, and 1,5-alkadienes with pentafluoro-λ6-sulfanyl (SF5) groups
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This paper describes a convenient and efficient synthesis of new pentafluoro-λ6-sulfanyl-containing 1,3-, 1,4- and 1,5-alkadienes and their epoxidation. These compounds are useful as monomers or as intermediates in the preparation of polymers, polymer surface coating and SF5-containing heterocyclic compounds. Georg Thieme Verlag Stuttgart.
- Brel, Valery K.
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- Process of producing 2-iminothiazoline derivatives and process of producing their intermediates
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There is disclosed a process of producing a 2-iminothiazoline derivative of the general formula [II], characterized in that a thiourea derivative of the general formula [I] is treated with an acid. Also disclosed are a process of producing an N-substituted N-arylcyanamide derivative of the general formula [VI], characterized in that an N-arylcyanamide derivative of the general formula [IV] is reacted with an allyl halide derivative of the general formula [V] in an aprotic polar solvent in the presence of an iodide and an alkali metal carbonate; and a process of producing an N-substituted N-arylthiourea derivative of the general formula [VII], characterized in that an N-substituted N-arylcyanamide derivative of the general formula [VI] obtained as described above is further reacted with a chemical species which generates sulfide ion or hydrogensulfide ion.
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- UNSATURATED COMPOUNDS. XV. LIQUID-PHASE LOW-TEMPERATURE CHLORINATION OF 2-CHLORO- AND 2,3-DICHLORO-2-BUTENES IN THE PRESENCE OF FERRIC CHLORIDE
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The effect of anhydrous ferric chloride on the degree of normal and anomalous chlorination of 2-chloro- and 2,3-dichloro-2-butenes at low temperatures (-20 to 0 deg C) in the presence of tert-butyl pyrocatechol was investigated.It was established that the addition of ferric chloride leads to a significant decrease in the amount of anomalous chlorination products.At the same time an increase is observed in the chlorination rate of trans-2,3-dichloro-2-butene. During the chlorination of 2,3-dichloro-2-butene under the influence of ferric chloride the anomalous chlorination product 2,3,3-trichloro-1-butene isomerizes to 1,2,3-trichloro-2-butene.
- Kaplanyan, E. E.,Mkrtchyan, A. M.,Voskanyan, E. S.
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- INVESTIGATION IN THE FIELD OF UNSATURATED COMPOUNDS VI. LIQUID-PHASE CHLORINATION OF 2-HALOGENO-2-BUTENES
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The liquid-phase chlorination of 2-halogeno-2-butenes in the presence of tert-butylpyrocatechol leads to the formation of the products from an anomalous reaction (2,3-dihalogeno-1-butenes), substitution of hydrogen at the double bond (2,3-dihalogeno-2-butenes), and normal addition (2,2,3-trihalogenobutanes).The ratios of these compounds are 70:6:24 in the case of 2-chloro-2-butene and 54:7.5:38.5 in the case of 2-bromo-2-butene.During the chlorination of 2-chloro-2-butene in the presence of sodium bicarbonate the formation of 3-chloro-2-butanol (20percent) was observed as a result of the combined addition of chlorine and water.
- Mkryan, G. G.,Kaplanyan, E. E.,Mkryan, G. M.
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p. 1833 - 1836
(2007/10/02)
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- Halogen Epoxides, 4. Synthesis, Stability and Reactions of 2-Chloro-2-(1-chloroalkyl)oxiranes with AgBF4
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Reactions of 3-chloroperbenzoic acid with 2,3-dichloro-1-butene (1a), 2,3-dichloro-3-methyl-1-butene (1b), (Z)- and (E)-1,2-dichloro-2-butene (1c, d) and with 1,2-dichloro-3-methyl-2-butene (1e) afforded the corresponding epoxides (2a - e).They rearranged slowly at room temperature and fast at elevated temperatures to form the corresponding isomeric α,α'-dichloroketones (3a, b).Reactions of the epoxides with AgBF4 produced α-chloro-α'-fluoroketones.
- Griesbaum, Karl,Lie, Giu Oan,Raupp, Erwin
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p. 3273 - 3280
(2007/10/02)
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