会议专题

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

4th ISETPP(第四届制浆造纸新技术国际研讨会)

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)