Synthesis and antifungal activity of novel s-substituted 6-fluoro-4-alkyl(aryl)thioquinazoline derivatives
作者:Guang-Fang Xu、Bao-An Song、Pinaki S. Bhadury、Song Yang、Pei-Quan Zhang、Lin-Hong Jin、Wei Xue、De-Yu Hu、Ping Lu
DOI:10.1016/j.bmc.2007.03.037
日期:2007.6
The resulting thiol obtained by treatment of hydroxyl group with phosphorus (V) sulfide is converted under phase transfer condition to 4-substituted 4-alkylthio-6-fluoroquinazoline derivatives by reaction with halide. The structures of the compounds are confirmed by elemental analysis, IR, and (1)H NMR. Title compounds 3a, 3g, and 3h are found to possess good antifungal activities. Using the mycelial
通过2-氨基-5-氟苯甲酸与甲酰胺的环化反应制备6-氟-4-喹唑啉醇。通过与磷(V)硫化物处理羟基获得的所得硫醇在相转移条件下通过与卤化物反应转化为4-取代的4-烷硫基-6-氟喹唑啉衍生物。化合物的结构通过元素分析,IR和(1)H NMR确认。发现标题化合物3a,3g和3h具有良好的抗真菌活性。在实验室中采用菌丝生长速率法研究了3g体外对尖孢镰刀菌的作用机理。结果表明3a,3g和3h对大多数真菌的生长具有较高的抑制作用,其EC(50)值范围为8.3至64.2 microg / mL。用100 g / mL的3g化合物处理过氧化葡萄球菌后,只有6。5%的孢子发芽。细胞膜的通透性随菌丝的畸形和其内体的凝结而增加。在12h内用100μg/ mL的化合物3g处理后,菌丝还原糖,D-GlcNAc,含量和几丁质酶活性下降,但可溶性蛋白含量无明显变化。