Patent ID: 7078546
Filing Date: 2006-07-18
Classification: C07F

Abstract:
1. A method for making 1,2-bis(9-bora-1,2,3,4,5,6,7,8-octafluorofluorenyl)-3,4,5,6-tetrafluorobenzene having the structure comprising: (a) reacting a 1,2-salt of 3,4,5,6-tetrafluorobenzene with a trialkylborate to provide a bis-boronic acid ester and hydrolyzing the bis-boronic acid ester to provide bis-1,2-[(dihydroxy)boryl]tetrafluorobenzene; (b) reacting bis-1,2-[(dihydroxy)boryl]tetrafluorobenzene with a hydrogen difluoride salt to provide a tetrafluorophenyl-bis-1,2-trifluoroborate salt; (c) reacting a tetrafluorophenyl-bis-1,2-trifluoroborate salt with boron trifluoride to provide 1,2-bis(difluoroboryl)tetrafluorobenzene; (d) reacting 1,2-bis(difluoroboryl)tetrafluorobenzene with boron tribromide to provide 1,2-bis(dibromoboryl)tetrafluorobenzene; and (e) reacting 1,2-bis(dibromoboryl)tetrafluorobenzene with a 9-(dialkyltin) perfluorofluorene to provide 1,2-bis(9-bora-1,2,3,4,5,6,7,8-octafluorofluorenyl)-3,4,5,6-tetrafluorobenzene.