Compound instability in dimethyl sulphoxide, case studies with 5-aminopyrimidines and the implications for compound storage and screening
作者:Eliška Procházková、Petr Jansa、Anna Březinová、Lucie Čechová、Helena Mertlíková-Kaiserová、Antonín Holý、Martin Dračínský
DOI:10.1016/j.bmcl.2012.08.065
日期:2012.10
The oxidation reactions of 5-aminopyrimidine derivatives in dimethyl sulphoxide (DMSO) were studied. The DMSO solutions of the studied compounds became deeply coloured within a few hours or days. The oxidation products can undergo further condensation reactions with the starting pyrimidines to yield bipyrimidines and/or pyrimidopteridines. The reaction mechanism of the oxidation-condensation reaction
研究了5-氨基嘧啶衍生物在二甲基亚砜(DMSO)中的氧化反应。所研究化合物的DMSO溶液在数小时或数天内会变深。氧化产物可与起始嘧啶进行进一步的缩合反应,以产生联嘧啶和/或嘧啶蝶啶。5-氨基嘧啶与四氧嘧啶(2,4,5,6-四氧嘧啶)的反应也支持了氧化-缩合反应的反应机理。DMSO通常在生物活性的体外测试中用作溶剂,但它也是氧化剂,可能与溶质分子发生反应,并显着影响生成的生化数据的质量。