31702-33-7Relevant academic research and scientific papers
Thermal cyclopropyl—allyl rearrangement of gem-chlorofluorocyclopropanes under gas-phase pyrolysis conditions. Formation of chlorofluoroalkenes and 2-fluorobuta-1,3-dienes
Volchkov,Lipkind,Nefedov
, p. 1391 - 1401 (2019/08/12)
The gas-phase pyrolysis of isomeric 2-chloro-2-fluoro-1-phenylcyclopropanes in a flow reactor at 250–430 °С gives 1-phenyl- and 3-phenyl-3-chloro-2-fluoropropenes. Under similar conditions, methyl-substituted gem-chlorofluorocyclopropanes undergo cyclopropyl—allyl isomerization accompanied by dehydrochlorination to form chlorofluoroalkenes and 2-fluoro-buta-1,3-dienes.
METHOD FOR PRODUCING UNSATURATED ACID AND/OR UNSATURATED ACID ESTER
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Paragraph 0093-0094, (2015/07/02)
The present invention relates to a method for producing an unsaturated acid and/or an unsaturated acid ester, containing a process A of reacting a compound (1) represented by the following formula (1) at a temperature of 0° C. to 350° C. in the presence of a Br?nsted acid catalyst and/or a Lewis acid catalyst, to prepare a compound (2) represented by the following formula (2); in which each of R1, R2 and R4 independently represents a hydrogen atom, a deuterium atom or an alkyl group; each of R3 and R5 independently represents a hydrogen atom or a deuterium atom; R6 represents a hydrogen atom, a deuterium atom, or an alkyl group or an aryl group; and X represents a chlorine atom, a fluorine atom, a bromine atom, or an iodine atom.
Correlation of Alkyl and Polar Substituents at the Alcoholic Side of Tertiary Acetates with the Rate of Pyrolyses in the Gas Phase
Gonzalez, Neil,Martin, Ignacio,Chuchani, Gabriel
, p. 1314 - 1318 (2007/10/02)
The rate coefficients for the gas-phase pyrolysis of several tertiary acetates have been measured in a static system over the temperature range of 220-340 deg C and pressure range of 40-186 torr.In seasoned vessels the reactions are homogeneous, follow a first-order rate law, and are unimolecular.The temperature dependence of the rate coefficients is given by the following Arrhenius equations: for 3,3,3-trichloro-2-methyl-2-propyl acetate, log k1 (s-1) = (13.86 +/- 0.35) - (188.8 +/- 3.8) kJ mol-1 (2.303 RT)-1; for methyl α-acetoxyisobutyrate, log k1 (s-1) = (12.42 +/- 0.28) - (174.6 +/- 3.2) kJ mol-1 (2.303 RT)-1; for 2-methyl-2-hexyl acetate, log k1 (s-1) = (13.35 +/- 0.33) - (166.1 +/- 3.4) kJ mol-1 (2.303 RT)-1; for 2,4-dimethyl-2-pentyl acetate, log k1 (s-1) = (12.42 +/- 0.19) - (154.1 +/- 1.9) kJ mol-1 (2.303 RT)-1; for 2-methyl-2-acetoxy-4-phenylbutane, log k1 (s-1) = (11.97 +/- 0.55) - (151.5 +/-5.6) kJ mol-1 (2.303 RT)-1.The effectof substituents in the gas-phase elimination of 2-substituted 2-propyl acetates may be either electronic or steric in nature.The linear correlations for electron-releasing groups and for electron-withdrawing groups are presented and discussed.The results of the present work together with those reported in the literature lead to the establishment of a possible generalization on the influence of substituents at the alcohols side of primary, secondary, and tertiary acetates pyrolyses in the gas phase.
Synthesis and Characterization of Polychlorinated Isobutenes
Schulze, K.,Hartmann, S.,Krueger, H.,Muehlstaedt, M.,Richter, C.,Richter, H.
, p. 433 - 442 (2007/10/02)
The preparation of polychlorinated methallylic chlorides by continuous chlorination of isobutene with different ratios of chlorine and following HCl-elimination is described.The structure is proved by reaction of the polychlorinated isobutenes with sodium thiolacetate and potassium thiocyanate and by spectroscopic methods.
