基于易分离的四烷基铵盐和四烷基phosph盐的高溶解度,对高不溶性环状酰胺的简单N-烷基化方法进行了阐述。该方法具有相当广泛的范围,不受异构体1和2的1,2,4-三唑并[1,5- a ]-嘧啶酮部分所连接的不同环的身份的影响,也不受该方法的影响。三唑取代基。在相对较低的温度下,它顺利进行,没有任何不想要的副产物,并且对水分不敏感。该方法允许的所有可能的一个简单的隔离Ñ烷基化衍生物3,7,和8。异构体的光谱分析3,7和8表明,我们的以前关于3型的形成结果Ñ烷基化衍生物作为主要产品Ñ -alkylations以及非烷基化异构体的互变异构体结构1和2是正确的。但是,它也表明,单个N-烷基化异构体3的分离及其与相应非烷基化衍生物的比较以证明其互变异构结构可能会导致错误。
On triazoles XI 11For Part X. see K. Esses-Reiter and J. Reiter, J. Heterocyclic Chem ( in press). structure elucidation of isomeric 1,2,4-triazolopyrimidinones
作者:József Reiter、László Pongó、Péter Dyortsák
DOI:10.1016/s0040-4020(01)81656-2
日期:——
The structure of Isomeric 3 – 6 type triazolo-pyrimidinones and their N-methylated and N-benzylat-ed derivatives was elucidated. In spite of the good agreement between the carbonyl bonds of derivatives 3 – 6 (R1= CH3, R=H, Q=SCH3) and their structure the IR method did not prove to be characteristic in general for the above structures. In contrast to the results reported previously it was found that