Hydrolysis and Photolysis of 4-Acetoxy-4-(benzothiazol-2-yl)-2,5-cyclohexadien-1-one, a Model Anti-Tumor Quinol Ester
作者:Yue-Ting Wang、Kyoung Joo Jin、Lauren R. Myers、Stephen A. Glover、Michael Novak
DOI:10.1021/jo9008436
日期:2009.6.19
activity against human breast, colon, and renal cancer cell lines, undergoes hydrolysis in aqueous solution to generate an oxenium ion intermediate, 3, that is selectively trapped by N3− in an aqueous environment. The 4-(benzothiazol-2-yl) substituent slows the rate of ionization of 1 compared to analogues with 4-phenyl or 4-(p-tolyl) substituents, 4a or 4b. However, once generated, 3 is somewhat more selective
4-乙酰氧基-4-(苯并噻唑-2-基)-2,5-环己二烯-1-酮,1,一对苯二酚衍生物,对人乳腺癌,结肠癌和肾癌细胞株,进行水解展品显著的抗肿瘤活性在水溶液中,以生成oxenium离子中间体,3,被选择性地由N个捕获3 -在水性环境中。与具有4-苯基或4-(对甲苯基)取代基4a或4b的类似物相比,4-(苯并噻唑-2-基)取代基减慢了1的电离速率。但是,一旦生成,3就会比4-苯基取代的阳离子5a更具选择性。。在B3LYP / 6-31G(d)水平上进行的计算结果表明,4-(苯并噻唑-2-基)取代基确实能够显着稳定3。主要孤立的叠氮化物加合物4-(6-叠氮基苯并噻唑-2-基)苯酚9的结构证实,正电荷在3中高度离域。1的水解结果表明4-(苯并噻唑-2-基)取代基具有显着的感应吸电子作用以及显着的供电子共振作用。1在水溶液中的光解会生成作为几种光解产物之一的喹诺尔2。喹诺酮的存在表明光解也部分导致