Enzyme-Labile Protecting Groups in Peptide Synthesis: Development of Glucose- and Galactose-Derived Urethanes
作者:Andrew G. Gum、Thomas Kappes-Roth、Herbert Waldmann
DOI:10.1002/1521-3765(20001016)6:20<3714::aid-chem3714>3.0.co;2-z
日期:2000.10.16
The development of the tetra-O-acetyl-D-glucopyranosyloxycarbonyl (AGlOC) and tetra-O-acetyl-beta-D-galactopyranosyloxycarbonyl (AGalOC) protecting groups, which are fully enzyme-labile, carbohydrate-derived urethanes, is described. The protected amino acids were easily synthesized and subsequently converted into a series of model dipeptides through classical peptide couplings. Cleavage of an alpha/beta-anomeric
描述了四-O-乙酰基-D-吡喃葡萄糖基氧羰基(AG10OC)和四-O-乙酰基-β-D-吡喃并吡喃糖基氧羰基(AGalOC)保护基的发展,它们是完全酶不稳定的,碳水化合物衍生的氨基甲酸酯。容易合成受保护的氨基酸,然后通过经典的肽偶联将其转化为一系列模型二肽。用“一锅法”方法以良好的产率实现了模型AG10C二肽的α/β-异头物混合物的切割。为了更好地理解酶促脱保护反应,通过两步生物转化(脂肪酶催化的脱乙酰基作用,然后是β-半乳糖苷酶催化的糖苷键断裂)去除了AGalOC基团。在这些非常温和的反应条件下(缓冲液pH7.0,37摄氏度),所需的N端 获得未保护的二肽缀合物。该方法被进一步用于合成高级四肽模型系统。