Synthesis of novel 9-O-N-aryl/aryl–alkyl amino carbonyl methyl substituted berberine analogs and evaluation of DNA binding aspects
作者:Anirban Basu、Parasuraman Jaisankar、Gopinatha Suresh Kumar
DOI:10.1016/j.bmc.2012.03.006
日期:2012.4
This manuscript describes the design and synthesis of three 9-O substituted analogs of plant alkaloid berberine to enhance the DNA binding affinity. Three analogs of berberine with aryl/aryl–alkyl amino carbonyl methyl substituent at the 9-position of the isoquinoline chromophore were synthesized and characterized by NMR (1HNMR and 13C NMR) and mass spectroscopy. The products were evaluated for their
该手稿描述了植物生物碱小ber碱的三种9-O取代类似物的设计和合成,以增强DNA结合亲和力。合成了三个小of碱类似物,它们在异喹啉发色团的9位上具有芳基/芳基-烷基氨基羰基甲基取代基,并通过NMR(1 HNMR和13NMR)和质谱。通过多种技术,例如分光光度法,光谱荧光法,圆二色性,热熔,粘度和等温滴定热法,评估了产品与小牛胸腺DNA的结合。结果表明,与小ber碱相比,这些类似物对DNA的结合亲和力高出六倍以上。从荧光和吸光度研究中可以推断,与亲本生物碱小ber碱的协同结合相反,所有类似物都非协同地结合至DNA。粘度和亚铁氰化物猝灭实验证实,类似物是对潜在生物应用有用的DNA较强的嵌入结合剂。还可以从圆二色性研究和热熔实验中推断出类似物的结合更强。从等温滴定量热法实验得出的结合的热力学结果表明,与小ine碱的焓驱动结合相比,这些类似物的熵驱动结合。类似物的微小但负的热容变化以及观察到的显着