Synthesis of 2,8-Disubstituted Imidazo[1,5-<i>a</i>]pyrimidines with Potent Antitumor Activity
作者:Hiroatsu Matsumoto、Kazuyoshi Ikeda、Nobuyuki Nagata、Hiroaki Takayanagi、Yoshihisa Mizuno、Motohiro Tanaka、Takuma Sasaki
DOI:10.1021/jm980731y
日期:1999.5.1
existence of both 2-thioxo and 8-substituent with a thioxo group in the molecule is crucial for the cytotoxicity against L1210 and KB cells. A novel procedure for introduction of a double bond between C-3 and C-4 in 8c was developed. Introduction of the 3,4-double bond increased the activity against L1210, but against KB cells the activity decreased by 4-fold. Cytotoxicity of compounds 8c and 8-thiocarbamoyl-1
设计并合成了十七种带有吸电子取代基的1,2,3,4-四氢咪唑并[1,5-a]嘧啶衍生物作为潜在的抗肿瘤剂,并进行了新的闭环反应。筛选了它们对小鼠白血病L1210和人口腔表皮样癌KB细胞系的活性,并讨论了其结构与体外抗肿瘤活性的关系。发现8-thiocarbamoyl-1,2,3,4-四氢咪唑并[1,5-a]嘧啶-2(1H)-硫酮(8c)的活性与5-氟尿嘧啶对L1210和KB细胞的活性相当。分子中同时存在带有巯基的2-thioxo和8-substant对L1210和KB细胞的细胞毒性至关重要。开发了在8c中引入C-3和C-4之间的双键的新方法。3的介绍,4-双键增加了对L1210的活性,但对KB细胞的活性降低了4倍。进一步评价了化合物8c和8-硫代氨基甲酰基-1,2-二氢咪唑并[1,5-a]嘧啶-2(1H)-硫酮(11c)对人实体瘤和白血病细胞系的细胞毒性。3,4-双键的饱和导致针对测试的肿瘤细胞系的细胞毒性显着增加。