作者:G. M. Blackburn、H. L. H. Dodds
DOI:10.1039/j29710000826
日期:——
relative to methyl formate originates entirely in increased entropy of activation. Imidazole acts as a general base in the catalysis of hydrolysis of compound (I) but as a nucleophile towards 2,2,2-trifluoroethyl formate. General base catalysis is more effective in aminolysis of compound (I) than in that of methyl formate, and imidazole achieves both general-acid and general-base catalysis of such reactions
N-乙酰基-O-甲酰基丝氨酰胺(I)水解的动力学数据表明,其相对于甲酸甲酯的增强的反应性完全源于活化熵的增加。咪唑在化合物(I)的水解催化中起一般碱的作用,但对2,2,2-三氟乙基甲酸酯则起亲核试剂的作用。通用碱催化在化合物(I)的氨解中比甲酸甲酯更有效,并且咪唑实现了该反应的通用酸催化和通用碱催化。