A novel series of building blocks consisting of benzo[4,5]thiazolo[1,2-a]pyrimidine-3-carboxylate have been synthesized as potential anticancer compounds. These compounds were prepared from 2-aminobenzothiazole, benzaldehyde and ethyl acetoacetate in ethylene glycol by catalysing with TBAHS to give benzo[4,5]thiazo[1,2-a]pyrimidine derivative 4 followed by the formation of amide by reaction with several secondary amines in good yields. The cytotoxicity of these compounds was evaluated against human cancer cell lines in vitro (A549, HeLa, MDA-MB-231 and MCF-7). Compound 5b exhibited promising cytotoxicity with IC₅₀ values of 0.58 and 1.58 μM specifically against human breast adenocarcinoma cell lines, MCF-7 and MDA-MB-231, while compound 5a showed promising cytotoxicity against MDA-MB-231 (IC₅₀ value of 5.01 μM).

已经合成了由苯并[4,5]噻唑并[1,2 - a ]嘧啶-3-羧酸酯组成的一系列新型结构单元，作为潜在的抗癌化合物。这些化合物是由2-氨基苯并噻唑，苯甲醛和乙酰乙酸乙酯在乙二醇中制备的，方法是用TBAHS催化生成苯并[4,5]噻唑[1,2- a ]嘧啶衍生物4，然后通过与数种仲二甲苯反应生成酰胺胺的收率很高。在体外评估了这些化合物对人类癌细胞系的细胞毒性（A549，HeLa，MDA-MB-231和MCF-7）。化合物5b对IC ₅₀表现出有希望的细胞毒性分别针对人乳腺腺癌细胞系MCF-7和MDA-MB-231的抗药性值为0.58和1.58μM，而化合物5a对MDA-MB-231的抗细胞毒性显示为有希望的（IC ₅₀值为5.01μM）。