One-step synthesis of 2,3-difluoronaphthalene by the gas-phase co-pyrolysis of styrene with chlorodifluoromethane
The gas-phase co-pyrolysis of styrene with CHClF2 in a flow reactor at 550–650 °C gives 2,3-difluoronaphthalene in two parallel reaction channels. The main channel includes decomposition of CHClF2 to difluorocarbene, whose subsequent
Volchkov,Lipkind,Nefedov
p. 1232 - 1238
(2019/07/15)
Pyrolysis of cyclobutanes from styrenes, acrylonitrile and methyl acrylate and polyfluoroolefines
The 2 + 2 cycloadduct of styrene and TFE (1) ring-expands and eliminates HF like a butadiene adduct to give 2,3-difluoronaphthalene (3).Cyclobutane 1 also cleaves to styrene and 1,1-difluorostyrene.Titania and other solid-acids accelerate the ring-expansi