The invention relates to a polycarboxylic acid organic ligand based on NDHPI modification and a synthesis method. The invention belongs to the technical field of organic chemical synthesis. Palladium-catalyzed coupling of 3,6_dibromotetramethylbenzene with methyl phenylboronic acid at 4 or 3,5 positions on the benzene ring resulted in the formation of triphenyl compounds containing polymethyl groups. Then, methyl groups were oxidized by potassium permanganate with pyridine and water as solvents at 90_110 C to form polycarboxylic terphenyl groups, which were then reacted directly with hydroxylamine hydrochloride in pyridine solution at 100 (?) for 5 hours after cooling. Removal of solvent, addition of water and hydrochloric acid to PH=1 can precipitate a large amount of precipitation, centrifugation, washing and drying can obtain a higher yield of the target product. Compared with the traditional process, the invention has simple process and high purity of the product. The MOFs material prepared by the invention has wide application prospects in the catalytic field because of its excellent catalytic efficiency as high as 94%99% and comprehensive properties such as recycling and reuse.
【技术实现步骤摘要】
一种基于NDHPI修饰的多羧酸有机配体及合成方法
本专利技术涉及一种基于NDHPI修饰的多羧酸有机配体,本专利技术进一步涉及该多羧酸配体的合成方法,属于有机化工合成
技术介绍
NDHPI是N,N′-二羟基均苯四酸亚胺的简称。作为电化学氧化基质或催化剂广泛应用于芳烃、烷烃、烯烃、炔烃、醇类、醚、酰胺和缩醛类的氧化反应中,是比较理想的绿色氧化剂,N,N′-二羟基均苯四酸亚胺(NDHPI),因其简单的制备工艺、双位点的活性基团以及高活性的催化性质使得NDHPI在分子氧氧化领域得到广泛的关注和应用。但作为均相的小分子催化剂,N,N′-二羟基均苯四酸亚胺(NDHPI)及其类似物和N-羟基邻苯二甲酰亚胺(NHPI)及其类似物,它们也与其他小分子催化剂一样存在着无法回收利用,增大反应后处理难度等问题。为了解决这类问题,相关研究人员尝试通过化学合成的方法将含有两个N-羟基活性位点的NDHPI固载在一些特制的固体材料表面,从而赋予了NDHPI非均相的特性。例如李星星等人尝试利用化学接枝法将活性组分NDHPI负载于载体SBA-15上,制备负载型催化剂(Co-SBA-15-I ...
【技术保护点】
1.一种基于NDHPI修饰的多羧酸有机配体,其特征在于:所述N,N′‑二羟基均苯四酸亚胺(NDHPI)修饰的多羧酸有机配体的结构式如下所示:
【技术特征摘要】
1.一种基于NDHPI修饰的多羧酸有机配体,其特征在于:所述N,N′-二羟基均苯四酸亚胺(NDHPI)修饰的多羧酸有机配体的结构式如下所示:式中,\COOH为单-COOH或双-COOH;其中:单-COOH是在苯环上的4位上(a);双-COOH是在苯环上的两个间位上(b);具体结构分别如下所示:上述(a)为4,4'-(2,6-二羟基-1,3,5,7-四氧代1,2,3,5,6,7-六氢吡咯并[3,4-F]异吲哚-4,8-二基)二苯甲酸;上述(b)为5,5'-(2,6-二羟基-1,3,5,7-四氧代1,2,3,5,6,7-六氢吡咯并[3,4-F]异吲哚-4,8-二基)二异酞酸。2.一种基于NDHPI修饰的多羧酸有机配体的合成方法,其特征在于:先按照摩尔比量取3,6-二溴四甲苯:甲基苯硼酸:钯催化剂:无机碱:去离子水=2:1:0.03:4:0.05,将他们加入到有机溶剂中,在N2保护下加热,温度为90-120℃,反应时间为8-12h,反应结束后直接将析出的目标...
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