Kinetics of the alkaline hydrolysis of several n-benzyloxycarbonyldipeptide methyl and ethyl esters
作者:D.A. Hoogwater、M. Peereboom
DOI:10.1016/s0040-4020(01)87839-x
日期:1990.1
The reaction rates of the alkaline hydrolysis of synthesized -protected dipeptide methyl and ethyl esters were studied systematically. From the kinetic data the energies of activation, the pre-exponential factors and the reference values at 40°C were calculated. The rate of hydrolysis shows to be strongly dependent on the C-terminal amino acid in the sequence Gly ⪢ Ala/Met/Phe ⪢ Leu ⪢ Val/Pro. Surprisingly
系统地研究了合成保护的二肽甲酯和乙酯的碱水解反应速率。从动力学数据计算出活化能,指数前因子和40°C时的参考值。水解速率显示出强烈依赖于序列Gly⪢Ala / Met / Phe⪢Leu⪢Val / Pro的C末端氨基酸。令人惊讶地,N-末端氨基酸也发挥作用,但是顺序不同。N端苯丙氨酸尤其显示出相对加速作用。值得注意的是,与相应的甲酯/甲醇/水相比,乙醇/水中的含甘氨酸的二肽乙酯的酯水解明显更快。