Studies on chemical carcinogens. XXIII. A simple method for characterization of the alkylating ability of compounds by using 4-(p-nitrobenzyl)pyridine.
作者:YUTAKA KAWAZOE、NOBUYA TAMURA、TOMOKO YOSHIMURA
DOI:10.1248/cpb.30.2077
日期:——
The present work provides a simple method for the characterization of alkylating agents by measuring the reaction selectivity toward 4-(p-nitrobenzyl) pyridine (NBP) in acetone containing phosphate buffer, evaluated in terms of the selectivity constant, SNBP, which is defined as log [H2O]/[NBP]×N%/(100-N%)}, where N% is the percentage molar fraction of NBP alkylation. SNBP values were determined for about 40 kinds of halides, methanesulfonates, tosylates, sulfates, phosphates, nitrosoureas, and nitrosoguanidines. SNBP can replace the substrate constant, s, of the Swain-Scott equation, and SNBP's of some of the agents examined here were linearly correlated with the s values.
本研究提供了一种简单的方法,通过测量烷基化试剂对在含有磷酸盐缓冲液的丙酮中4-(对硝基苯基)吡啶(NBP)的反应选择性来表征这些试剂,评估指标为选择性常数SNBP。SNBP定义为log[H2O]/[NBP]×N%/(100-N%)),其中N%是NBP烷基化的摩尔分数百分比。约40种卤化物、甲磺酸酯、托烷基磺酸酯、硫酸盐、磷酸盐、亚硝酰脲和亚硝基胍的SNBP值被确定。SNBP可以替代Swain-Scott方程中的基质常数s,本文中检查的一些试剂的SNBP与s值呈线性相关。