dehydrogenase than 8f. 9f could be used as a novel antifungal lead compound for further study. Graphical abstract Two series of novel isoquinoline derivatives 8, 9 containing 3-aryl were rational designed and synthesized based on quaternary isoquinoline alkaloids. The bioassay and interaction mechanism studies indicated that 9f should be considered as potential antifungal lead.
                                    在天然杀菌先导化合物的筛选中,以
血根碱、
白屈菜红碱和
小檗碱为基础,设计合成了两个系列的新型3-芳基
异喹啉衍
生物8和9 。它们的结构通过一维、二维核磁共振和高分辨质谱得到证实。大多数标题化合物在 50 mg/L 浓度下表现出中等至优异的体外抗真菌活性,其活性比先导
血根碱高得多。其中,9f对茄病链格孢(80.4%)、链格孢(88.2%)和梨轮纹孢(93.8%)的效果最好。此外, 9f (3.651 mg/L) 对P. piricola的
EC 50略好于
百菌清 (3.869 mg/L)。在苹果上研究了9f对P. piricola的体内抗真菌活性。50和100mg/L剂量的治疗和保护效果分别为70.45~81.67%和64.96~80.34%,与
百菌清的80.30~86.67%、73.08~76.92%相当。分子静电势和分子对接分析表明,9f被正电位轮廓完全覆盖,比8f更容易与
琥珀酸脱氢酶的负
氨基