products in 48–74% yields. Some tert-butyl 2-(4-oxo-1,3-thiazolidin-2-ylidene)ethanoates produce, along with the desired tert-butyl [1,3] thiazolo[3,2-c]pyrimidine-8-carboxylates, the corresponding 8-carboxylic acids in 18–21% yields. A reliable structural determination of all the synthesized compounds has been performed by elemental analysis and a number of spectroscopic methods (1H and 13C NMR, HPLC/MS
描述了一种制备新的 5 H- [1,3]
噻唑并[3,2- c ]
嘧啶衍
生物的方便有效的合成路线,它涉及酰基或烷氧羰基α-官能化的2-亚甲基-1,3-
噻唑啉- 4-ones 与 1-
氯苄基
异氰酸酯。最佳反应条件,即在没有有机碱的情况下在
甲苯中加热试剂,以 48-74% 的产率提供目标产物。一些叔丁基 2-(4-oxo-1,3-thiazolidin-2-ylidene) ethanoates 与所需的叔丁基 [1,3]
噻唑并 [3,2- c]
嘧啶-8-
羧酸盐,相应的8-
羧酸的产率为18-21%。已通过元素分析和多种光谱方法(1 H 和13 C NMR、HPLC/MS 和 FT-IR)以及 X 射线衍射分析对所有合成化合物进行了可靠的结构测定。 图形摘要