Two-step, high-yielding total synthesis of antibiotic pyrones
作者:Akram Hussain、Revoju Sravanthi、Sunitha Katta、Dhevalapally B. Ramachary
DOI:10.1039/d3ob01923c
日期:——
antibiotics photopyrones, pseudopyronines, and violapyrones from bio-renewable triacetate lactone in excellent yields. These pyrones are functionally modified into another set of pyrone natural products by a single O-methylation reaction. The high-yielding gram scale synthesis of four natural products [pseudopyronine A, photopyrone A, pseudopyronine B and photopyrone C] demonstrated the viability for
开发了一种简单的两步二烷基化方案,以优异的产率从生物可再生三乙酸内酯合成生物活性抗生素光吡喃酮、假吡喃酮和紫拉吡喃酮。这些吡喃酮通过单个O-甲基化反应被功能性修饰成另一组吡喃酮天然产物。四种天然产物 [pseudopyronine A、photopyrone A、pseudopyronine B 和 photopyrone C] 的高产克级合成证明了工业应用的可行性。
Total synthesis of (
<i>S</i>
)‐(+)‐
<i>ent</i>
‐phomapyrones B and surugapyrone B
maculans, has been synthesized as the enantiomeric form starting from (S)‐2‐methylbutanol (4). Surugapyrone B (3) isolated from Streptmyces sp. USF‐6280 as an antioxidant has also been synthesized as a natural form. The absolute configuration of phomapyrone B (1) was estimated to be the (R)‐form and that of surugapyrone B (3) being the (S)‐form. A series of 2‐pyrone derivatives 17 have been synthesized through