Chinese Journal of Applied Chemistry ›› 2018, Vol. 35 ›› Issue (11): 1331-1334.DOI: 10.11944/j.issn.1000-0518.2018.11.170429

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Regioselective Synthesis of Dibenzo[d,f][1,3]dioxepines

ZHANG Baohua,SHI Lanxiang()   

  1. College of Chemical Engineering,Shijiazhuang University,Shijiazhuang 050035,China
  • Received:2017-11-27 Accepted:2018-02-05 Published:2018-10-31 Online:2018-10-31
  • Contact: SHI Lanxiang

Abstract:

In order to overcome the shortcomings of facile production of dihydroxy diphenyl ethylene by-product in traditional method, dibenzo[d,f][1,3]dioxepines was synthesized highly regioselectively from a broad range of terminal alkynes with Lewis acidic guanidinium ionic liquid catalyst in 39%~84% yields. The Lewis acidic guanidinium ionic liquid can be reused five times without significantly decrease in catalytic activity.

Key words: guanidinium ionic liquid, dibenzo[d, f][1, 3]dioxepine, dihydroxybiphenyl, terminal alkyneterminal alkyne