Kinetics and Mechanism of Decompositions of<i>N</i>-Methyl-<i>N</i>′-aryl-<i>N</i>-nitrosoureas and Related Compounds in Aqueous Buffer Solution
作者:Kitaro Yoshida、Kazuyuki Yano
DOI:10.1246/bcsj.55.2200
日期:1982.7
The decomposition reactions of N-methyl-N′-aryl-N-nitrosoureas (1) and of N,N′-dimethyl-N′-aryl-N-nitrosoureas (2) were studied kinetically in phosphate buffer solution. All nitrosoureas 1 were easily hydrolyzed even under neutral conditions and the rates of hydrolysis were found to be proportional to the hydroxide ion concentration over pH range 5.4–7.6. General base catalysis by buffer components
N-甲基-N'-芳基-N-亚硝基脲(1)和N,N'-二甲基-N'-芳基-N-亚硝基脲(2)在磷酸盐缓冲溶液中的分解反应动力学研究。即使在中性条件下,所有亚硝基脲 1 也很容易水解,并且发现水解速率与 pH 值范围 5.4-7.6 内的氢氧根离子浓度成正比。缓冲液成分的一般碱催化作用可以忽略不计。该反应经历消除机制,其中作为初始步骤涉及脲基质子的提取。另一方面,亚硝基脲 2 在相同条件下没有显着的反应性。