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Facile preparation of α,ω-diynes bearing a perfluoroalkylene linker –(CF2)n– (n = 4,6) and their application for Co- or Rh-catalyzed [2+2+2]cycloaddition reactions affording aromatic compounds with perfluoroalkylene units
Journal of Fluorine Chemistry ( IF 1.7 ) Pub Date : 2020-03-17 , DOI: 10.1016/j.jfluchem.2020.109512
Tomohiro Agou , Shogo Saruwatari , Tomohiro Shirai , Tatsuya Kumon , Shigeyuki Yamada , Tsutomu Konno , Yoshiyuki Mizuhata , Norihiro Tokitoh , Yoshihisa Sei , Hiroki Fukumoto , Toshio Kubota

α,ω-Diynes bearing a perfluoroalkylene linker HC≡C(CF2)nC≡H (n = 4,6) were obtained from commercially available α,ω-dienes H2C=CH(CF2)nCH=CH2 via bromination and dehydrobromination. In the presence of CoCl2-Zn-ZnI2 catalyst, the diyne HC≡C(CF2)4C≡H underwent [2+2+2] cycloaddition reactions with terminal alkynes to afford benzene derivatives fused with an octafluorocyclohexene moiety. In this reaction, trimerization of the diyne was observed as a major side reaction. Rh-catalyzed aromatization polymerization of the diyne HC≡C(CF2)6C≡H afforded an insoluble polymer consisting of a densely cross-linked, aromatic skeleton, which was characterized by solid-state CP-MAS 13C NMR and IR spectroscopy. This insoluble polymer exhibited high thermal stability, and engineering applications of the product polymer are being evaluated.



中文翻译:

带有全氟亚烷基连接基-(CF 2n-(n = 4,6)的α,ω-二炔的简便制备及其在Co或Rh催化的[2 + 2 + 2]环加成反应中的应用,提供带有全氟亚烷基的芳族化合物单位

α,ω-二炔轴承的全氟亚接头HC≡C(CF 2ñ C≡H(N = 4,6)是由市售的α,ω二烯h条件2 C = CH(CF 2Ñ CH = CH 2通过溴化和脱氢溴化。在氯化钴的存在下2 -Zn-ZnI 2催化剂中,二炔HC≡C(CF 24 C≡H后行[2 + 2 + 2]与末端炔烃,得到与octafluorocyclohexene部分稠合的苯衍生物环加成反应。在该反应中,观察到二炔的三聚是主要的副反应。二炔HC≡C(CF 26的Rh催化芳构化聚合C≡H得到由致密交联的芳族骨架组成的不溶聚合物,其通过固态CP-MAS 13 C NMR和IR光谱表征。这种不溶性聚合物表现出高的热稳定性,并且正在评估产物聚合物的工程应用。

更新日期:2020-04-21
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