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The Reaction between Furfuryl Alcohol and Model Compound of Protein

机译：糠醇与蛋白质模型化合物的反应

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摘要

To guide the preparation of protein-based adhesive, especially the soy-based adhesive, the reaction between a simple dipeptide N -(2)- l -alanyl- l -glutamine (AG), being used as a model compound of protein, and its cross-linker furfuryl alcohol were studied in this paper. The products that were prepared with furfuryl alcohol and AG under different pHs were analyzed by ESI-MS, 13 C NMR, and FT-IR. It was found that the medium environment had great effects on the competition of the co-condensation reaction between furfuryl alcohol and AG and self-condensation reaction of furfuryl alcohol molecules in the mixing system with furfuryl alcohol and AG. Under alkaline conditions, both co- and self-condensation were not obviously detected. Only when the value of pH was higher than 11, were a few co-condensation reaction products gotten. The reaction occurred mainly between furfuryl alcohol and the primary amido groups of AG. Under acid conditions, both co- and self-condensation were observed. The more acid the preparation conditions were, the easier to be observed the self-condensation of furfuryl alcohol molecules would be than the co-condensation between furfuryl alcohol and AG. When the value of pH was higher than 5, both co- and self-condensation were not outstanding. In this study, under pH 3, the co- and self-condensation found equilibrium. There was a great possibility for the primary amido and aliphatic amino groups of AG molecules to react with furfuryl alcohol molecules. No reaction was detected between the secondary amido groups of AG and furfuryl alcohol.
机译：为了指导蛋白质基胶粘剂，特别是大豆基胶粘剂的制备，简单的二肽N-（2）-1-丙氨酰基-1-谷氨酰胺（AG）之间的反应被用作蛋白质的模型化合物，并且本文研究了其交联剂糠醇。用ESI-MS，13 C NMR和FT-IR分析了在不同pH下用糠醇和AG制备的产物。研究发现，介质环境对糠醇与AG的共缩合反应的竞争以及糠醇分子与糠醇和AG的混合体系中的自缩合反应的竞争有很大影响。在碱性条件下，没有发现共冷凝和自冷凝。仅当pH值高于11时，才得到一些共缩合反应产物。该反应主要在糠醇和AG的伯酰胺基团之间发生。在酸性条件下，观察到共冷凝和自冷凝。制备条件越酸，糠醇分子与AG的共缩合反应就越容易观察到糠醇分子的自缩合反应。当pH值高于5时，共冷凝和自冷凝均不突出。在这项研究中，在pH 3下，共冷凝和自冷凝达到平衡。 AG分子的伯酰胺基和脂族氨基与糠醇分子反应的可能性很大。在AG的仲酰胺基和糠醇之间未检测到反应。

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