- METHOD FOR PRODUCING CHLORINE-CONTAINING OLEFIN
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PROBLEM TO BE SOLVED: To efficiently produce 1220xa using raw material having satisfactory gettability. SOLUTION: By (the third step) where 1,1,1,2,3,3-hexachloropropane (230da) is subjected to dehydrochlorination with a liquid phase in the presence of a lewis acid catalyst, the problem is solved. The 230da can be produced by subjecting the 1,1,3,3-pentachloropropane (240fa) to dehydrochlorination in a liquid phase in the presence of a lewis acid catalyst so as to be converted into 1,1,3,3-tetrachloropropene(1230za)(the first step), and next subjecting the 1230za to chlorination with chlorine (Cl2) at a liquid phase in the presence of a lewis acid catalyst (the second step). The fact that the reaction of the first to third steps can be performed in one pot multistep reaction utilizing all the same lewis acid catalyst has been found. As the lewis acid activity, aluminum chloride and ferric chloride are particularly suitably adopted. SELECTED DRAWING: None COPYRIGHT: (C)2017,JPOandINPIT
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Paragraph 0126-0129; 0132-0133
(2018/08/30)
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- Determination of the Constitution of Highly Chlorinated Organic Compounds via INADEQUATE 13C Nuclear Magnetic Resonance Spectroscopy
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By means of 13C-13C-spin-spin couplings obtained by one- or two-dimensional double quantum coherence NMR spectroscopy with the pulse sequence INADEQUATE it is now possible (a) to assign the 13C NMR signals of known highly chlorinated organic compounds by sure (1-4) and (b) to determine the constitution of unknown highly chlorinated compounds (5-7, 9-12).From the 1JC=C values increments are deduced which allow to predict 1JC=C values of other compounds (Table 7).
- Bauer, Hans,Buddrus, Joachim,Auf der Heyde, Wolfgang,Kimpenhaus, Wolfgang
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p. 1890 - 1903
(2007/10/02)
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- Convenient Synthesis of Vinylcyclopropanes by Intermolecular Trapping of Thermally Generated Perchlorovinylcarbene
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Tetrachlorocyclopropene (1) is ringopened above 150 deg C to give perchlorovinylcarbene (2), which is intermolecularly trapped by olefins with high efficiency.The olefin configuration is retained in the products, 1-chloro-1-(trichlorovinyl)cyclopropanes 7, 11, and 14, respectively.With n-hexane and adamantane 17 - 19 as well as 21 and 22 are obtained by C-H insertion.For 21 olefins with different degrees of substitution and types of substituents the isolated yields range from 24 to 88 percent, in most cases above 60 percent.Acrylonitrile (9 percent) and substituted acrylonitriles (17 percent) give lower yields, acrylates, however, react well.The torsional barriers of the chloro(trichlorovinyl)cyclopropane derivatives 14 are unusually high (17.4 - 18.6 kcal/mol) for vinylcyclopropane systems.Products 7 can be reductively dechlorinated to vinylcyclopropane hydrocarbons 23, ethylidenecyclopropanes 24 being observed as by-products.
- Weber, Walter,Meijere, Armin de
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p. 2450 - 2471
(2007/10/02)
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