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以β-(3,5-二叔丁基-4-羟基苯基)丙酰氯(简称3,5-丙酰氯)为原料,以1.0G聚酰胺-胺(PAMAM)为桥联基,通过酰胺化反应合成2种含有4个受阻酚单元的树状PAMAM桥联受阻酚.通过条件优化实验确定最佳反应条件:n(3,5-丙酰氯)∶n(PAMAM)=6∶1;K2CO3为促进剂;苯和水为反应混合溶剂,其中苯用量为40mL,水用量为9.7mL;反应时间15h;反应温度为25℃,此条件下可以得到纯度较高的2种树状PAMAM桥联受阻酚.红外光谱、核磁共振及质谱分析表明,合成的分子与目标分子结构完全相符.
Starting from β- (3,5-di-tert-butyl-4-hydroxyphenyl) propionyl chloride (abbreviated as 3,5-propionyl chloride) and using 1.0G polyamide-amine (PAMAM) as the bridging group, Two kinds of PAMAM bridged hindered phenols with four hindered phenol units were synthesized by chemical reaction. The optimal reaction conditions were determined by the optimized conditions: n (3, 5-propionyl chloride): n (PAMAM) = 6:1; As the promoter; benzene and water as the reaction mixture solvent, wherein the amount of benzene was 40mL, the amount of water was 9.7mL; reaction time was 15h; the reaction temperature was 25 ℃, under these conditions can be obtained two kinds of high purity PAMAM bridge Hindered phenols.IR, NMR and mass spectrometry showed that the synthesized molecules were completely consistent with the target molecular structure.