First total synthesis of chromanone A, preparation of related compounds and evaluation of their antifungal activity against <i>Candida albicans</i>, a biofilm forming agent
作者:Iván Cortés、Estefanía Cordisco、Teodoro S. Kaufman、Maximiliano A. Sortino、Laura A. Svetaz、Andrea B. J. Bracca
DOI:10.1039/d1ra02553h
日期:——
A straightforward and convenient approach for the first total syntheses of chromanone A and a related 7-OMe substituted natural product is reported. These unique C-3 substituted 2-hydroxymethyl chromones were recently isolated as fungal metabolites. Chromanone A was synthesized in 25.3% overall yield from the readily available pyrocatechol, whereas the second natural product was prepared in 39.7% global
报道了首次全合成苯并二氢吡喃酮 A 和相关 7-OMe 取代的天然产物的直接且方便的方法。这些独特的 C-3 取代的 2-羟甲基色酮最近作为真菌代谢物被分离出来。由容易获得的邻苯二酚合成的色满酮 A 的总产率为 25.3%,而第二种天然产物的总产率为 39.7%。针对白色念珠菌ATCC 10231(一种生物膜形成剂)对一个小型色酮库(包括天然产物及其一些合成杂环前体)进行了评估。结果发现,苯并二氢吡喃酮A的部分氧化形式8-methoxy-3-methyl-4-oxo-4 H -chromene-2-carbolefin的最低抑菌浓度为7.8 μg mL -1 ,可显着抑制酵母菌的毒力。因素,包括颊上皮细胞的粘附和磷脂酶的分泌,以及芽管的形成和菌丝假菌丝体的产生。此外,尽管杂环对念珠菌生物膜的形成表现出不显着的抑制作用,但它在62.5 μg mL -1的浓度下完全抑制了预形成的生物膜中白色念珠菌的生长。