Combining total synthesis and genetic engineering to probe dihydropyran formation in ambruticin biosynthesis
作者:James I. Bowen、Xiaotong Zhong、Kaining Gao、Benjamin Reed、Matthew P. Crump、Luoyi Wang、Christine L. Willis
DOI:10.1039/d4sc00720d
日期:——
derived natural products isolated from the myxobacterium Sorangium cellulosum. Their unusual structures include a trisubstituted cyclopropyl group and two oxygen heterocycles, a tetrahydropyran (THP) and dihydropyran (DHP). Herein we report a flexible modular approach for the total synthesis of ambruticins which is used to prepare ambruticins F and S as well as in the first total synthesis of 20,21-dihydroambruticin
ambruticins 是从粘杆菌 Sorangium cellulosum 中分离的强效抗真菌聚酮衍生的天然产物家族。它们不寻常的结构包括一个三取代的环丙基和两个氧杂环,一个四氢吡喃 (THP) 和二氢吡喃 (DHP)。在此,我们报道了一种灵活的模块化方法,用于制备 ambruticins F 和 S,以及 20,21-二氢ambruticin F 的首次全合成。灵活的策略通过 Julia-Kocienski 烯化结合 3 个片段,并为研究 ambruticin 生物合成中二氢吡喃形成提供了重要标准。野生型 S. cellulosum So ce10 的培养物主要产生 ambruticin S 和 VS 系列代谢物。一种高效的电穿孔方法使基因敲除实验成为可能,该实验显示 S. cellulosum 的 ΔambP-S 突变体积累了 bisTHP 聚酮 20,21-二氢氨布鲁霉素 F。相比之下,ΔambN-S