65038-15-5Relevant academic research and scientific papers
Ionic liquids accelerating cycloaddition between 1-aryl-2-halocyclopropenes and furan
Ding, May-Fan,Lin, Shaw-Tao,Chang, Woan-Ju
experimental part, p. 240 - 247 (2010/09/16)
Treatment of a series of 1-aryl-2,2-dihalocyclopropanes with t-BuOK at-10 °C gave the corresponding 1-aryl-2-halocyclopropenes, which react with furan in a RTIL to give a fair good yield of the [4+2]-cycloadducts with more than 90% of the exo-isomer. The imidazolium type ionic liquids are able to accelerate this cycloaddition process with high steric selectivity. Neither pyrrole nor thiophene undergoes the cycloaddition with cyclopropene to form the [4+2]-cycloadduct. 1-Aryl-3,3-difluoro-2-halocyclopropenes are inert towards furan even at a temperature higher than 100 °C.
