Studies of Imidazo[1,2-a]Benzimidazoles 32*. Synthesis and Properties of 2,3-Dihydroimidazo-and 2,3,4,10-Tetrahydropyrimido[1,2-a]Benzimidazol-9(10)-Ylacetic Acids
作者:V. A. Anisimova、I. E. Tolpygin、O. I. Askalepova
DOI:10.1007/s10593-014-1427-1
日期:2014.3
Reaction of unsubstituted 2,9-dihydro-3H-imidazo- and 2,3,4,10-tetrahydropyrimido[1,2-a]benz-imidazoles with haloacetates has given hetaryl-9(10)-acetates. The basic and acid hydrolysis of these esters yields the corresponding acids. The zwitterionic structure of the acids obtained has been proved. They were also prepared by the direct alkylation of unsubstituted azaheterocycles using sodium chloroacetate
未取代的2,9-二氢-3 H-咪唑基和2,3,4,10-四氢嘧啶基[1,2 - a ]苯并咪唑与卤代乙酸酯的反应得到了杂芳基-9(10)-乙酸酯。这些酯的碱水解和酸水解产生相应的酸。已经证明了所获得的酸的两性离子结构。它们也可以通过使用氯乙酸钠将未取代的氮杂杂环直接烷基化或通过水解相应的乙腈来制备。合成的酯容易进行氨解和肼解。