Total Syntheses of Favolasins A, E, G and K, Polyketides Isolated from Cultures of the Basidiomycetes Fungi
<i>Favolaschia sp</i>
.
<scp>BCC</scp>
18686 and
<i>Favolaschia calocera</i>
<scp>BCC</scp>
36684
作者:Bingbing Sheng、Ping Lan、Jolynn Kiong、Zeinab G. Khalil、Robert J. Capon、Martin G. Banwell
DOI:10.1002/cjoc.202200822
日期:——
substituted 2-(oxiran-2-ylmethoxy)phenol while a base-promoted 6-exo-tet cyclization of the same substrate was used to construct the 2,3-dihydrobenzo[b][1,4]dioxine core of target 2. The spectral data derived from the four synthetically-produced favolasins matched those reported for the corresponding natural products. Preliminary biological screening of compounds 1—3 as well as a suite of fourteen precursors
分配给最近报道的天然产物蚕豆素类的所有四个成员1-4的结构已首次通过化学合成制备。Suzuki-Miyaura 交叉偶联化学用于建立相关联的联芳亚结构。用于制备与化合物3和4相关的 1,5-苯并二恶英环系的关键步骤是酸催化的适当取代的 2-(oxiran-2-ylmethoxy) 苯酚的 7- exo -tet 环化,同时碱促进相同底物的6-外-tet 环化用于构建目标2的 2,3-二氢苯并 [ b ][1,4] 二恶英核心. 四种合成蚕豆素的光谱数据与相应天然产物的报告相匹配。化合物1 - 3以及一组十四种前体的初步生物筛选表明它们没有显着的抗细菌、抗真菌或抗肿瘤活性,但同类物 K ( 4 )在 mM 范围内对疟原虫具有活性恶性疟原虫。