ROLE OF COUNTER ANION IN ACID HYDROLYSIS OF GLYCOSIDES
Methyl α-D-glycopyranoside (MGPα) and methyl β-D-glycopyranoside (MGPβ) were hydrolyzed faster in 0.2 mol/L HBr than in 0.2 mol/L HCl and H2SO4 systems. The hydrolysis rates were slightly faster when KBr and KCl were added, respectively, to the above former two systems, which probably results from the higher ion strengths in the systems with the salts. However, the rate difference between the HBr and HCl systems cannot rationally be explained. The proton activities in these systems should be compared to evaluate this difference. If the proton activities are not the same, the role of Br- is to result in the higher proton activity. If the proton activities are the same, Br- is suggested to participate more significantly in the hydrolysis reactions.
acid hydrolysis counter anion glycoside
Duyhung Phan Tomoya Yokoyama Yuji Matsumoto
Laboratory of Wood Chemistry, Department of Biomaterial Sciences, Graduate School of Agricultural and Life Sciences, The University of Tokyo, 1-1-1 Yayoi, Bunkyo-ku, Tokyo 113-8657, JAPAN
国际会议
广州
英文
1310-1311
2010-11-08（万方平台首次上网日期，不代表论文的发表时间）