Bis-dithiobenzilnickel complexes for usae in near-infrared absorbing materials and benzoin derivatives as intermediates therefor
申请人:NIPPON PAPER INDUSTRIES CO., LTD.
公开号:EP0564282A2
公开(公告)日:1993-10-06
A benzoin compound is synthesized from phenylglyoxal and a substituted benzene, and the resulting benzoin compound is converted to a bis-thiobenzilnickel complex using phosphorus pentasulfide/nickel chloride. The resulting bis-thiobenzilnickel complex of Formula [1] and/or [2]:
(wherein R₁ to R₅ are the same or different, and denote substituted or unsubstituted alkyl, cycloalkyl, alkoxy, aryl, aryloxy, halogen atom, or hydrogen atom, except for substituted or unsubstituted amino group and alkoxyalkoxy group. However, a case where all of R₁ to R₅ are hydrogen atoms is excepted.) contains two phenyl groups and two substituted phenyl groups and is useful as a near-infrared absorbing material in, for example, optical recording materials and molding compositions containing transparent resins.
由苯基乙二醛和取代苯合成安息香化合物,然后用五硫化二磷/氯化镍将生成的安息香化合物转化为双硫代二苯乙镍络合物。得到的双硫代二苯乙二镍络合物为式[1]和/或[2]:
(其中 R₁ 至 R₅ 相同或不同,表示取代或未取代的烷基、环烷基、烷氧基、芳基、芳氧基、卤原子或氢原子,但取代或未取代的氨基和烷氧基除外。然而,R₁至 R₅全部为氢原子的情况除外。)含有两个苯基和两个取代苯基,可用作光学记录材料和含有透明树脂的成型组合物等的近红外吸收材料。