Regioselective functionalization of pyrones: Facile synthesis of 6-styrylpyrones via KHMDS-mediated aldol condensation
作者:Ramakrishna Samala、Manas K. Basu、K. Mukkanti
DOI:10.1016/j.tetlet.2021.153574
日期:2022.1
Herein, we disclose our efforts directed toward the synthesis of the kavalactone-based natural product penstyrylpyrone and other related 4-OMe-2-pyrones possessing diverse substituents at the 3-, 5-, and 7-positions. Further, a facile approach to access 6-styrylpyrones via the KHMDS-mediated regioselective aldol condensation of 2-pyrones is described with moderate substrate scope and good to high yields
在此,我们公开了我们致力于合成基于 kavalactone 的天然产物 penstyrypyrone 和其他相关的 4-OMe-2-pyrones,这些 4-OMe-2-pyrones 在 3-、5-和 7-位具有不同的取代基。此外,描述了一种通过KHMDS 介导的 2-吡喃酮的区域选择性羟醛缩合获得 6-苯乙烯基吡喃酮的简便方法,具有中等底物范围和良好到高产率(58-80%)。这种方法的效用通过去甲氧基仰光素、asnipyrone A 和 asnipyrone B 的立体选择性构建得到了例证。