作者:Harri Lo¨nnberg
DOI:10.1016/0040-4020(82)80241-x
日期:1982.1
on the heterolysis of the monoprotonated substrates are interpreted to indicate that the acidic hydrolysis of l-(l-alkoxyethyl)cytosines proceeds by rate-limiting departure of the protonated base moiety with formation of an oxocarbenium ion intermediate. The same mechanism is extended to the hydrolysis of cytidines by comparing the influences that the 5-substituents have on the heterolysis of protonated
已经制备了几种5-取代的1-(1-烷氧基乙基)胞嘧啶,并在各种氧鎓离子浓度下测定了它们的水解速率常数。单质子化底物的酸度常数及其分解的速率常数已经从获得的pH值曲线中算出。解释改变1-烷氧基乙基的极性性质对单质子化底物的杂化施加的作用被解释为表明1-(1-烷氧基乙基)胞嘧啶的酸性水解是通过限制质子化碱基部分的离去而进行的。氧碳鎓离子中间体的形成。