【摘 要】
：
A novel approach to the synthesis of 2,2′,3,3′-biphenyltetracarboxylic dianhydride is described.The target compound was prepared by a nickel-catalyzed couplin
【出 处】
：
Chinese Chemical Letters
论文部分内容阅读
A novel approach to the synthesis of 2,2′,3,3′-biphenyltetracarboxylic dianhydride is described.The target compound was prepared by a nickel-catalyzed coupling reaction of dimethy 3-chlorophthalate(3-DMCP) for 4 h at 70-80℃,followed by subsequent hydrolysis of tetra-ester in acid solution and dehydration of tetra-acid,with overall yield of 68%.The structures of the products were characterized by IR,~1H NMR and ~(13)C NMR respectively.
A novel approach to the synthesis of 2,2 ’, 3,3’-biphenyltetracarboxylic dianhydride is described. The target compound was prepared by a nickel-catalyzed coupling reaction of dimethy 3-chlorophthalate (3-DMCP) for 4 h at 70- 80 ° C, followed by subsequent hydrolysis of tetra-ester in acid solution and dehydration of tetra-acid, with an overall yield of 68%. The structures of the products were characterized by IR, ~ 1H NMR and ~ (13) C NMR respectively.
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