Pyrylium-mediated transformations of natural products. Part 5. Reactions of gelatin and chymotrypsin with 4-(4-methoxy-3-sulphophenyl)-2,6-bis-(4-sulphophenyl)pyrylium perchlorate
作者:Alan R. Katritzky、Jerzy L. Mokrosz、Maria L. Lopez-Rodriguez
DOI:10.1039/p29840000875
日期:——
The title pyrylium salt reacts with lysine residues in gelatin and chymotrypsin in aqueous buffer to form rapidly the corresponding divinylogous amide and pseudobase in a ratio depending on the protein concentration. First-order ring closure of the divinylogous amide proceeds at rates comparable to those observed with the analogous intermediate from free lysine.
标题吡喃鎓盐与明胶和胰凝乳蛋白酶在水性缓冲液中的赖氨酸残基反应,以根据蛋白质浓度的比例快速形成相应的二乙烯基酰胺和假碱基。二乙烯基酰胺的一级闭环反应的速率与游离赖氨酸的类似中间体所观察到的速率相当。