Synthesis of perfluorobicyclic ethers [2]. The electrochemical fluorination of α-cyclohexenyl-substituted carboxylic acid derivatives
作者:Takashi Abe、Eiji Hayashi、Hajime Baba、Shunji Nagase
DOI:10.1016/s0022-1139(00)81474-8
日期:1984.8
The electrochemical fluorination of α-cyclohexenyl-substituted carboxylic esters [; R′CH3, C2H5, C3H7)] afforded both perfluoro(9-alkyl-7-oxa-bicyclo[4.3.0]nonane)s and perfluoro(8-alkoxy-9-alkyl-7-oxabicyclo[4.3.0]nonane)s in fairly good yields. As the driving force for the ring-closure in this fluorination, a mechanism which involves a resonance stabilized intermediate radical is proposed. Perf
α-环己烯基取代的羧酸酯的电化学氟化[; R'CH 3,C 2 H ^ 5,C 3 H ^ 7)]以相当好的收率提供了全氟(9-烷基-7-氧杂双环[4.3.0]壬烷)和全氟(8-烷氧基-9-烷基-7-氧杂双环[4.3.0]壬烷)。作为该氟化中的闭环的驱动力,提出了具有共振稳定的中间自由基的机理。通过以下方法获得全氟(8-氯-8-甲氧基-9-乙基-7-氧杂双环[4.3.0]壬烷)和全氟(8,8-二氯-9-乙基-7-氧杂双环[4.3.0]壬烷)。用无水氯化铝控制全氟(8-甲氧基-9-乙基-7-氧杂双环[4.3.0]壬烷)的氯化反应产率低。通过红外,质谱和19 F nmr光谱以及元素分析对本实验中获得的一些新的稠合全氟双环醚和全氟酰氟进行了表征。