Synthesis and bioactivities of Phenazine-1-carboxylic acid derivatives based on the modification of PCA carboxyl group
作者:Zhipeng Xiong、Junfan Niu、Hao Liu、Zhihong Xu、Junkai Li、Qinglai Wu
DOI:10.1016/j.bmcl.2017.03.011
日期:2017.5
(Rhizoctonia solani) and 127.28mg/L (Fusarium graminearum), respectively. The results indicated that the carboxyl group of PCA could be modified to be amide group, acylhydrazine group, ester group, methyl, hydroxymethyl, chloromethyl and ether group etc. And appropriate modifications on carboxyl group of PCA were useful to extend the fungicidal scope.
吩嗪-1-羧酸(PCA)作为天然产物广泛存在于假单胞菌和链霉菌的微生物代谢物中,并已在中国注册为杀灭水稻白叶枯病的杀真菌剂。为了发现具有较高杀菌活性的化合物并研究PCA的羧基改变后对杀菌活性的影响,我们通过修饰PCA的羧基合成了一系列PCA衍生物,并通过1H NMR和HRMS证实了其结构。大多数化合物在体外均表现出显着的杀真菌活性。特别是,与阳性对照PCA的EC50值为7.88mg / L相比,化合物6的EC50值为EC3值为3.35mg / L表现出对茄红枯萎病的抑制作用,化合物3b的EC50值为8.30mg / L表现出对禾谷镰刀菌的抑制作用。 L(Rhizoctonia solani)和127。分别为28mg / L(禾谷镰刀菌)。结果表明,可将PCA的羧基修饰为酰胺基,酰基肼基,酯基,甲基,羟甲基,氯甲基和醚基等。对PCA的羧基进行适当的修饰可扩大杀菌范围。