The synthesis and hydrolysis of a series of deoxy- and deoxyfluoro-α-d- “glucopyranosyl” phosphates
作者:Stephen G. Withers、M.David Percival、Ian P. Street
DOI:10.1016/0008-6215(89)80055-2
日期:1989.4
syntheses of three deoxy-α- d - “glucopyranosyl” phosphates and a series of dideoxymonofluoro- and dideoxydifluoro-α- d -glucopyranosyl phosphates are described. Rate constants for their acid-catalyzed hydrolysis were determined. Deoxygenation in the sugar ring was shown to increase the hydrolysis rate to the extent seen previously for acid-catalyzed hydrolysis of a series of phenyl deoxy- d - “glucopyranosides”
摘要描述了三种脱氧-α-d-“吡喃葡萄糖基”磷酸酯和一系列双脱氧单氟-和双脱氧二氟-α-d-吡喃葡萄糖基磷酸酯的合成。测定其酸催化水解的速率常数。已显示糖环中的脱氧可将水解速率提高至先前对一系列苯基脱氧d-“吡喃葡萄糖苷”进行酸催化水解所见的程度[Mega and Matsushima,J. Biochem。东京,94(1983)1637]。这表明这两个反应的过渡态基本相同。通过确定一系列脱氧和脱氧氟取代的6-脱氧-6-氟-α-d-葡萄糖基吡喃糖基磷酸酯的水解速率,可证明对糖环的取代基作用具有可预测的加性,并且本质上主要是电子的,