PREPARATION OF IMIDAZO[2,1-b]THIAZOLES AND THIAZOLO[3,2-a]-BENZIMIDAZOLES USING S-ETHENYLSULFILIMINES
作者:Katsuya Ikeda、So-Ichiroh Hata、Yasuhiro Tanaka、Tamotsu Yamamoto
DOI:10.1080/00304940009355945
日期:2000.8
construction. Previous papers reported the efficient preparation of cyclopropanes' and 2-substituted oxazolines' by the reaction of active methylene compounds and amides with 1, respectively. The present paper describes the elaboration of thiaza five-membered ring upon imidazoles and imidazolines to generate thiazolo[2,1 -b]imidazoles and imidazo[3,2-a]benzoimidazoles. Thiazolo[2,1blimidazole derivatives
我们一直在开发使用 S-乙烯基硫亚胺 (1) 作为构建环的构建单元。以前的论文报道了通过活性亚甲基化合物和酰胺分别与 1 反应有效制备环丙烷和 2-取代的恶唑啉。本论文描述了噻唑五元环在咪唑和咪唑啉上的制备,以生成噻唑并 [2,1-b] 咪唑和咪唑并 [3,2-a] 苯并咪唑。噻唑并[2,1bl咪唑衍生物先前已通过2-巯基咪唑啉与1,2-diha10乙烷的反应获得,~ I-(2-羟乙基)-2-巯基咪唑啉与 2-(2-卤乙基)亚氨基噻唑啉(来自 2-inethylthio-2-thiazoline 氢碘化物和 2aminoethanol)5 的 6N HCL4 环化以及 2-imino-3 的环化-(2-氯乙基)噻唑啉(来自异硫氰酸酯和二-(2-卤代乙基)胺)。~噻唑并[3,2-aJ苯并咪唑衍生物已通过2-巯基苯并咪唑与1,2-二卤代乙烷反应获得1-(2-卤乙基)-2-巯基苯并咪唑的环化。8