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Approach to the Synthesis of Dimeric Salen-Co(Ⅲ):A Recoverable Catalyst for Rac-Eprichlorohydrin HKR
The synthesis of chiral dimeric Salen ligand 5, 5'-methylene-di-[(R, R )-| N-(3-tert-butylsalicylidine)-N'- ( 3', 5'-di- tert-butylsalicylidene) | - 1, 2-cyclohexanediamine ] which using 2-tert-butylphenol as starting material is reported. This compound reacts with cobalt (Ⅱ) acetate and then oxidized by air to give dimeric Salen catalyst 5 in this paper, which catalyzes the hydrolytic kinetic resolution (HKR) of racemic epichlorohydrin to afford biologically important chiral epoxides and diols. Ee values of diol up to 97 % were obtained, and the catalyst was recovered with no apparent loss. 相似文献
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用分子烙印聚合物吸附溶液中的TNT 总被引:7,自引:3,他引:4
为清除红水中的大量硝基苯类化合物,用分子烙印技术研究了TNT的选择性吸附,以TNT为模板分子、TRIM为交联剂、丙烯酸胺为单体,合成了分子烙印聚合物(MIP).利用MIP从甲醇水溶液中清除TNT,其吸附性能由RP-HPLC检测.MIP的吸附动力学研究结果表明,吸附饱和时间约为40 min,1 mg·Ml-1MIP使溶液中TNT的浓度在30 min内由13.7 mg·L-1降至1.10 mg·L-1,吸附率高达92%,说明MIP对模板分子TNT有很好的选择性. 相似文献
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