One-step synthesis of 2,3-difluoronaphthalene by the gas-phase co-pyrolysis of styrene with chlorodifluoromethane
作者:N. V. Volchkov、M. B. Lipkind、O. M. Nefedov
DOI:10.1007/s11172-019-2546-8
日期:2019.6
two parallel reaction channels. The main channel includes decomposition of CHClF2 to difluorocarbene, whose subsequent cycloaddition to styrene affords 1,1-difluoro-2-phenylcyclopropane. This compound rearranges to 2-fluoroindene giving finally difluoronaphthalene upon the second difluorocarbene cycloaddition and subsequent aromatization of the resulting cycloadduct. The second reaction channel consists
在流动反应器中,在 550–650 °C 下,苯乙烯与 CHClF2 的气相共热解在两个平行反应通道中得到 2,3-二氟萘。主要通道包括 CHClF2 分解为二氟卡宾,随后与苯乙烯环加成得到 1,1-二氟-2-苯基环丙烷。该化合物在第二次二氟卡宾环加成和随后所得环加合物的芳构化后重排为2-氟茚,最终得到二氟萘。第二个反应通道包括 1,1,2,2-四氟-3-苯基环丁烷的芳构化,它是由苯乙烯与四氟乙烯(二氟卡宾二聚的产物)的 [2+2]-环加成形成的。