Mild photoactivation of new BINOL-amino acid and -amino ester conjugates (BINOLAMs) yielded alkylating and DNA cross-linking agents with high photoefficiency and superior cytotoxicity. Detection of the transient electrophile, by laser flash photolysis (LFP), suggests that BINOL-quinone methides (QMs) are key intermediates in the process. QMs trapping by water, monitored in a time-dependent product
新的BINOL-
氨基酸和-
氨基酯共轭物(BINO
LAM)的轻度光活化产生了烷基化和DNA
交联剂,具有高光效率和优异的细胞毒性。通过激光闪光光解(LFP)对瞬态亲电试剂的检测表明,BINOL-醌甲基化物(QM)是该过程中的关键中间体。在随时间变化的产品分布分析中监测的被
水捕获的QMs表明,BINO
LAMs作为双烷基化剂的光触发反应性是两步过程的结果,该过程涉及单烷基化QMs的顺序光生。BINOL-L-
氨基酯的光活化产生了对人肿瘤LoVo细胞非常有效的细胞毒性QM,
EC50在130-230 nM范围内。三甲基
补骨脂素(PS)的功效比我们新测试的化合物低约4倍。