Gas-phase pyrolysis of 1-chloro-1-fluoro-2-methylcyclopropanes in the presence of SiO2 or Al2O3 with the formation of 2-chloro- or 2-fluorobuta-1,3-dienes
Thermal cyclopropyl—allyl rearrangement of gem-chlorofluorocyclopropanes under gas-phase pyrolysis conditions. Formation of chlorofluoroalkenes and 2-fluorobuta-1,3-dienes
作者:N. V. Volchkov、M. B. Lipkind、O. M. Nefedov
DOI:10.1007/s11172-019-2567-3
日期:2019.7
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.
异构 2-氯-2-氟-1-苯基环丙烷在流动反应器中于 250–430 °C 的气相热解得到 1-苯基-和 3-苯基-3-氯-2-氟丙烯。在类似条件下,甲基取代的偕-氯氟环丙烷发生环丙基-烯丙基异构化,并伴随脱氯化氢反应形成氯氟烯烃和 2-氟-丁-1,3-二烯。
Selective dehydrofluorination in the thermolysis of gem-fluorochlorocyclopropanes in the presence of aluminum oxide
作者:N. V. Volchkov、M. B. Lipkind、A. V. Zabolotskikh、O. M. Nefedov
DOI:10.1007/bf00963043
日期:1990.1
US3906052A
申请人:——
公开号:US3906052A
公开(公告)日:1975-09-16
US3989845A
申请人:——
公开号:US3989845A
公开(公告)日:1976-11-02
Gas-phase pyrolysis of 1-chloro-1-fluoro-2-methylcyclopropanes in the presence of SiO2 or Al2O3 with the formation of 2-chloro- or 2-fluorobuta-1,3-dienes
作者:N. V. Volchkov、M. B. Lipkind、M. A. Novikov、O. M. Nefedov
DOI:10.1007/s11172-014-0730-4
日期:2014.10
Gas-phase pyrolysis of of 1-chloro-1-fluoro-2-methylcyclopropanes in an empty or filled with quartz pieces flow-tube reactor at 430—460 °C gives 2-fluorobuta-1,3-dienes (in 42—75% yields), whereas pyrolysis in the presence of Al2O3 at 150—250 °C gives 2-chlorobuta-1,3-dienes as the major products (in 58—68% yield).