Prep. of boron [fluoroaryl] compound

• Main Authors: YAMAMOTO HISAKI, KATSUMI IKUYO, MII KIN
• Format: Patent
• Language: English
• Published: 16.05.2001
• Edition: 7
• Subjects: ACYCLIC, CARBOCYCLIC OR HETEROCYCLIC COMPOUNDS CONTAININGELEMENTS OTHER THAN CARBON, HYDROGEN, HALOGEN, OXYGEN, NITROGEN,SULFUR, SELENIUM OR TELLURIUM; CHEMISTRY; METALLURGY; ORGANIC CHEMISTRY

A fluoroaryl magnesium derivative expressed by General Formula (1): where each of R1-R5 represents a hydrogen atom, a fluorine atom, a hydrocarbon group, or an alkoxy group while at least one of R1-R5 representing a fluorine atom, and Xa represents a chlorine atom, a bromine atom, or an iodine atom; and boron halide expressed by General Formula (2) : BXb3 where Xb represents a fluorine atom, a chlorine atom, a bromine atom, or an iodine atom, are reacted with each other in a solvent (a) containing diethyl ether and/or tetrahydrofuran, after which the resulting reaction solution is added to a solvent (b) having a higher boiling point than diethyl ether and/or tetrahydrofuran while diethyl ether and/or tetrahydrofuran are distilled out. Consequently, it has become possible to obtain a (fluoroaryl)borane compound expressed by General Formula (3): where each of R1-R5 represents a hydrogen atom, a fluorine atom, a hydrocarbon group, or an alkoxy group while at least one of R1-R5 representing a fluorine atom, Xb represents a fluorine atom, a chlorine atom, a bromine atom, or an iodine atom, and n represents 2 or 3, from which magnesium halide produced as a by-product is separated and removed, selectively in a simple manner at a low cost.