Several pyrimido[4,5-b]quinolines, flavin analogues, have been prepared by assisted microwave intramolecular cyclization of N4-substituted-2,4-diamino-6-chloropyrimidine-5-carbaldehydes. The reaction takes place with hydrolysis of amino-group and chlorine. Particularly valuable features of this method included the broader substrate scope and operational simplicity as well as increased safety for small-scale
通过N 4取代的2,4-二氨基-6-氯嘧啶-5-甲醛的微波辅助分子内环化反应,已经制备了几种嘧啶[4,5- b ]喹啉,黄素类似物。该反应在氨基和氯的水解下进行。该方法特别有价值的特征包括更宽的基板范围和操作简便性,以及用于小规模高速合成的更高的安全性。
Synthesis of 2-amino-2-deoxo-5-deazaflavins and related compounds
作者:Takeshi Aoyagi、Reiko Yanada、Kiyoshi Bessho、Fumio Yoneda、W. L. F. Armarego
DOI:10.1002/jhet.5570280611
日期:1991.10
10-Alkyl-2-amino-2-deoxo-5-deazaflavins were prepared by the condensation of 2-amino-6-chloro-5-formylpyrimidin-4(3H)-one with the corresponding N-alkylanilines. 2-Amino-10-p-tolyl-2-deoxo-5-deazaflavin was prepared by the condensation of 2-amino-6-p-toluidinopyrimidin-4(3H)-one with o-chlorobenzaldehyde. Some reactivities of 2-aminopyrimidin-4(3H)-ones are described.