Producing process of (fluoroaryl) borane compound and producing process of tetrakis (fluoroaryl) borate derivative
申请人:NIPPON SHOKUBAI CO., LTD.
公开号:EP0838466A3
公开(公告)日:1999-11-24
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 (2)
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.
通式(1)所表示的是一种氟芳基镁衍生物,其中R1-R5中的每一个代表氢原子、氟原子、碳氢基团或烷氧基团,而至少有一个R1-R5代表氟原子,Xa代表氯原子、溴原子或碘原子;通式(2)所表示的是一种硼卤化物,其中Xb代表氟原子、氯原子、溴原子或碘原子。这两种化合物在含有乙醚和/或四氢呋喃的溶剂(a)中反应,反应后的溶液加入沸点高于乙醚和/或四氢呋喃的溶剂(b)中,同时蒸馏出乙醚和/或四氢呋喃。因此,可以简单低成本地选择性地分离和去除作为副产物的镁卤化物,从而得到通式(3)所表示的(氟芳基)硼烷化合物,其中R1-R5中的每一个代表氢原子、氟原子、碳氢基团或烷氧基团,而至少有一个R1-R5代表氟原子,Xb代表氟原子、氯原子、溴原子或碘原子,n代表2或3。