Novel Structural Motifs Consisting of Chiral Thiazolines: Synthesis, Molecular Recognition, and Anticancer Activity
作者:Fu She Han、Hiroyuki Osajima、Mui Cheung、Hidetoshi Tokuyama、Tohru Fukuyama
DOI:10.1002/chem.200601446
日期:2007.4.5
The facile synthesis of linear and cyclic chiral oligo(4-alpha/beta-methyl)thiazolines is described. Linear oligothiazolines have been efficiently synthesized by the iterative formation of thiazoline rings and two-directional block condensation. The construction of 24- to 36-membered cyclic oligothiazolines was achieved through the head-to-tail cyclo-oligomerization of doubly deprotected linear fragments
描述了线性和环状手性低聚(4-α/β-甲基)噻唑啉的简便合成方法。通过噻唑啉环的反复形成和双向嵌段缩合,已经有效地合成了线性寡噻唑啉。通过双脱保护的线性片段从头到尾的环寡聚反应,可实现24至36元环寡噻唑啉的构建。对线性和环状低聚物与手性化合物的相互作用的研究表明,环状低聚物对扁桃酸具有很强的结合亲和力,而线性低聚物则显示较差的亲和力。线性低聚物已被证明可以抑制癌细胞系HPAC,PC-3和HCT-116的细胞生长。结构活性关系的研究表明,IC 50值明显取决于线性低聚物的长度和末端官能度。较长的衍生物显示出针对所有三种癌细胞的更强活性(例如,hexi-和octithiazozolines表现出IC50 <1 microM)。与之形成鲜明对比的是,环状低聚物对所有三个细胞系均无活性。