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    • 2. 发明授权
    • Process for producing brominated acenaphthylene condensates
    • 生产溴化苊缩合物的方法
    • US4898998A
    • 1990-02-06
    • US615541
    • 1984-05-31
    • Masashige KuboHideo SakkaYukihiro Tsutsumi
    • Masashige KuboHideo SakkaYukihiro Tsutsumi
    • C07C17/25C07C25/22
    • C07C17/269C07C17/10C07C17/14C07C17/25C07C17/392C07C25/22C07C2103/20
    • A process for producing brominated acenaphthylene condensates of the formula: ##STR1## wherein x is 1 or 2, y is an integer from 1 to 6 and n is 1 or more, from elementary units of the following formulas: ##STR2## wherein y is as defined above, comprising, (A) brominating the side chain of the acenaphthene with 0.2 to 2.0 times as many moles of bromine as acenaphthene, said bromination initiated by ultraviolet radiation or by a radical initiator in a halogenated hydrocarbon solvent, (B) adding a Lewis acid catalyst to the reaction solution of step (A) to promote the condensation of the brominated acenaphthene product of step (A), (C) adding to the reaction solution of step (B) an equimolar or more amount of bromine relative to the amount of acenaphthene starting material, to further brominate and condense the brominated acenaphthene and/or brominated acenaphthene condensates; and (D) dehydrobrominating the brominated acenaphthene condensates.
    • 其中x为1或2,y为1至6的整数,n为1或更大的下式的基本单元:< IMAGE>和/或 其中y如上所定义,包括:(A)用苊的0.2至2.0倍的溴的量使溴化苊的侧链,所述紫外线辐射引发的溴化或卤代烃中的自由基引发剂 溶剂,(B)向步骤(A)的反应溶液中加入路易斯酸催化剂以促进步骤(A)的溴化苊产物的缩合,(C)向步骤(B)的反应溶液中加入等摩尔或 更多量的溴相对于苊原料,进一步溴化和缩合溴化苊和/或溴化苊缩合物; 和(D)溴化苊缩合物脱氢溴化。