苯并噻唑砜修饰的FF二肽的合成及其自组装行为的研究开题报告
2022-01-05 21:13:31
全文总字数:5998字
1. 研究目的与意义及国内外研究现状
通过h-phe-oet与mbta-oh的实验研究,了解实验过程中的物质反应机理,学习研究反应中的肽类自组装行为,拓展学习的知识面和应用领域。
二肽分子自组装研究可应用于超分子自组装、共组装、酶催化组装、传感、药物传递、组织工程等领域,应用范围及其广泛,通过实验了解其中原理。
肽类物质是生物体内不可或缺的活性物质。目前生物体内已发现几百种肽类物质,分别有着不同的功能和用途,涉及生物体内的每一项生理活动,起着至关重要的作用。肽作为蛋白质的中间产物,对于生物体的构成具有非常重要的意义;肽分子本身所具有的生物活性,对于生物体的免疫、神经系统也有着不可替代的作用。
2. 研究的基本内容
由于如萘乙酰基(Nap)、9-芴甲氧羰酰基(Fmoc)等疏水基团常被引入FF二肽的氮端增强二肽的自组装获得水凝胶,我们计划通过向FF中引入如图所示苯并噻唑砜基团到二肽FF中,由于苯并噻唑具有与萘基类似的芳香性,也能够发生π-π堆叠作用促使二肽的自组装,同时苯并噻唑环上的杂原子也为该体系提供了一定的极性,使之具有不同于萘环的特殊的性质,这将极可能赋予自组装多肽新的特性。对可自组装的苯并噻唑砜修饰的多肽水凝胶进行设计和制备,同时对水凝胶的性质和应用等进行研究。
3. 实施方案、进度安排及预期效果
本课题中主要以h-phe-oet与mbta为原料制备目标产物,h-phe-oet是l-苯丙氨酸乙酯盐酸盐,h-phe-oet和mbta在hobt、edchcl、dipea、dcm等试剂共同作用的条件下逐步合成mbta-ff。其中hobt和edc是一个良好的偶联体系可以有效地促进反应。然后通过对mbta-ff进行氧化反应制备苯并噻唑砜衍生的sbta-ff。
实验共有5个步骤,通过建立反应和逐步添加试剂及进行操作最终爬板来对比实验的结果。完成一轮完整实验步骤需要的时间大约为3-4天。
理想的实验结果爬板中所得试剂的样本点应与样本一致,说明实验达到了较好的效果。
4. 参考文献
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