Synthesis of new functionalized imidazo[2,1-b]thiazoles and thiazolo[3,2-a]pyrimidines
作者:Lucija Peterlin-Mašič、Mateja Malešič、Matej Breznik、AleŠ Krbavčič
DOI:10.1002/jhet.5570370115
日期:2000.1
and 6-methylimidazo[2,1-b]thiazole-5-carboxylic acid (17) were reacted with amines 6a-i by the reaction with oxalyl chloride and N, N-di methyl-formamide as a catalyst into primary and secondary amide derivatives 7-14 and 19-22. From compound 24 N,N'-disubstituted ureas 26, 27 and perhydroimidazo[1,5-c]thiazole 29 derivatives of imidazo[2,1-b]thiazole were prepared. By nmr analysis of compound 29, the
5-Oxo-5 H- [1,3]噻唑并[3,2 - a ]嘧啶-6-羧酸(4)和6-甲基咪唑并[2,1 - b ]噻唑-5-羧酸(17)通过与草酰氯和作为催化剂的N,N-二甲基甲酰胺的反应,使胺与胺6a-i反应成伯和仲酰胺衍生物7-14和19-22。由化合物24制备N,N′-二取代的脲26、27和咪唑并[2,1- b ]噻唑的全氢咪唑并[ 1,5- c ]噻唑29衍生物。通过化合物的核磁共振分析 由图29可知,存在由C7'a的手性中心引起的旋光性和C5N6 '键的旋转受限引起的构象异构性这两种立体异构体的存在。