Synthesis of a series of phenylacetic acid 1-β-O-acyl glucosides and comparison of their acyl migration and hydrolysis kinetics with the corresponding acyl glucuronides
作者:Lisa Iddon、Selena E. Richards、Caroline H. Johnson、John R. Harding、Ian D. Wilson、Jeremy K. Nicholson、John C. Lindon、Andrew V. Stachulski
DOI:10.1039/c0ob00820f
日期:——
carboxylate group of the acyl glucuronides plays a part in the mechanism of the internal acyl migration. In addition, such acyl glucosides are known to be endogenous biochemicals in their own right and investigation of their acyl migration propensities is novel. Our previously described selective acylation procedure has proved highly successful for 1-β-O-acyl glucuronide synthesis and when subsequently
我们报告了 1-β- O-酰基葡萄糖苷 的共轭 苯乙酸 (PAA),R-和 S-α-甲基-PAA 和 α,α'-二甲基-PAA,并通过NMR方法测量其转酰基和水解反应性。这些是酰基葡糖醛酸苷的类似物,其酰基转移动力学在药物不良反应中可能很重要。这项工作的目的之一是调查是否如先前所推测的那样,酰基葡糖醛酸内酯的游离羧酸盐基团是否在内部机理中起作用。酰基移民。另外,已知此类酰基葡糖苷本身就是内源性生化物质,并且对其进行了研究。酰基移民倾向是新颖的。我们先前描述的选择性酰化程序已证明在以下方面非常成功1-β- O-酰基葡糖醛酸 综合以及随后应用于 6- O-三苯甲基葡萄糖,它具有良好的收率和优异的端基异构体选择性。轻度酸解邻三苯甲基中间体以优异的产率得到所需的酰基葡糖苷,基本上具有完全的β-选择性。测量酰基葡萄糖苷通过1 H NMR光谱进行的转酰基反应动力学(仅基于pH 7.4的水性缓冲液中1-