Structural and synthetic studies on maleic anhydride and related diacid natural products
作者:David M. Heard、Emyr R. Tayler、Russell J. Cox、Thomas J. Simpson、Christine L. Willis
DOI:10.1016/j.tet.2019.130717
日期:2020.1
coupling of the appropriate nitronate with an unsaturated bromo-diester which was prepared in 2 steps from citraconic anhydride. The reported structures of the anhydride waquafranone B and the parent diacid were synthesised leading to revision of the originally proposed structure of the natural product and, in accord with Sutherland, confirming that anhydrides with exo-dienes are unstable. Biomimetic
已经开发了一种简明的方法,用于预先从三叶草三叶草中分离出的三聚乙酸A,B和C的全部合成,从而确认了这些真菌天然产物的结构。所需的(E)-1,3-二烯骨架是通过适当的硝酸盐与不饱和溴二酯的偶联,通过完全立体控制生成的,该不饱和溴二酯由柠康酸酐分两步制备。合成了报道的酸酐Waquafranone B和母体二酸的结构,导致对天然产物最初提出的结构进行了修改,并与Sutherland一致,证实了酸酐与exo-二烯是不稳定的。研究了拟南芥鞘磷脂单体的仿生二聚化。