名称:
Isomerization of perfluoro-3,3-diethylindan-1-one into perfluoro-1,3-dimethyl-4-ethyl-1 H-isochromen under the action of antimony pentafluoride
摘要:
The heating of perfluoro-3,3-diethylindan-1-one with SbF(5) at 180 degrees C after treatment of the reaction mixture with anhydrous HF afforded perfluoro-1,3-dimethyl-4-ethylisochromen, and after hydrolysis, perfluoro-1,3-dimethyl- 4-ethyl-1H-isochromen-1-ol. The latter under the action of NaHCO(3) converted into 5,6,7,8-tetrafluoro1,3-bis(trifluoromethyl)-1H-isochromen-1-ol. Both isochromenols reacted with SOCl(2) gave the corresponding polyfluoro-1-chloro-1H-isochromens. On dissolving isochromenols in CF(3)SO(3)H and isochromens in SbF(5) perfluoro-1,3-dimethyl-4-ethylisochromenyl and 5,6,7,8-tetrafluoro-1,3-bis(trifluoromethyl) isochromenyl cations were generated which by hydrolysis were converted into the corresponding isochromenols.