申请人:Sumitomo Chemical Company, Limited
公开号:EP2033944A1
公开(公告)日:2009-03-11
A process for the production of a halogen-substituted benzenedimethanol represented by the formula (2):
wherein X1, X2, X3 and X4 are the same or different and independently represent a hydrogen atom or a halogen atom, provided that at least one of X1, X2, X3 and X4 represents a halogen atom, comprising reacting a halogen-substituted terephthalic acid diester represented by the formula (1):
wherein X1, X2, X3 and X4 are the same meanings as defined above and R1 and R2 are the same or different and independently represent an unsubstituted or substituted alkyl group, a metal borohydride compound and an acid in the presence of an ether solvent, wherein the amount of the acid is 0.2 to 3 moles per 1 mole of the metal borohydride compound based on protons, and the reaction is conducted under the condition where the liquid phase of the reaction mixture is a single layer.
一种以式(2)为代表的卤代苯二甲醇的生产工艺:
其中 X1、X2、X3 和 X4 相同或不同,且独立地代表氢原子或卤素原子,条件是 X1、X2、X3 和 X4 中至少有一个代表卤素原子,包括使式(1)所代表的卤代对苯二甲酸二酯反应:
其中 X1、X2、X3 和 X4 的含义与上述定义相同,R1 和 R2 相同或不同且独立地代表未取代或取代的烷基、金属硼氢化 合物和酸在醚溶剂存在下反应,其中酸的量为每 1 摩尔金属硼氢化合物中含有 0.2 至 3 摩尔的质子,反应在反应混合物的液相为单层的条件下进行。