申请人:THE DOW CHEMICAL COMPANY
公开号:EP0440390A1
公开(公告)日:1991-08-07
Triaromatic bisphenols are prepared by reacting a phenolic compound with at least one halo-compound selected from aromatic compounds having an (α,α-dihalo)alkyl or (α-halo)alk-1-enyl substituent with at least one β-hydrogen atom in said alkyl or alkenyl moiety, a trihalomethyl substituent or a dihalocyanomethyl substituent. Preferably, said halo-compound is 1,1-dichloroethylbenzene, 1-chlorostyrene, or mixtures thereof. The reaction may be conducted in the presence or absence of a solvent; an excess of the phenolic compound can serve as the solvent. The product is conveniently recovered by removing the by-product HCl, excess phenolic compound, excess solvent and cooling. Yields of greater than 90 percent of theoretical and a large proportion of para isomer can be obtained. Tris-(1,1,1-(4-hydroxyaromatic) toluenes are believed to be novel compounds.
三芳香族双酚的制备方法是将酚类化合物与至少一种卤代化合物反应,这些卤代化合物选自芳香族化合物,具有(α,α-二卤)烷基或(α-卤)烷-1-烯基取代基,在所述烷基或烯基中至少有一个β-氢原子、一个三卤甲基取代基或一个二卤氰基取代基。所述卤代化合物最好是 1,1-二氯乙基苯、1-氯苯乙烯或它们的混合物。反应可在有溶剂或无溶剂的情况下进行;过量的酚类化合物可用作溶剂。除去副产物 HCl、过量的酚类化合物、过量的溶剂并冷却,即可方便地回收产物。理论产量超过 90%,并可获得大量对位异构体。三(1,1,1-(4-羟基芳香族)甲苯被认为是一种新型化合物。