Total Synthesis and Stereochemical Confirmation of 2,5-Diaryl-3,4-dimethyltetrahydrofuran Lignans: (+)-Fragransin A<sub>2</sub>, (+)-Galbelgin, (+)-Talaumidin, (-)-Saucernetin and (-)-Verrucosin
作者:Stephen Hanessian、Gone Reddy
DOI:10.1055/s-2007-968019
日期:2007.2
A new ring closure to tetrasubstituted tetrahydrofurans from the intramolecular attack of an OMOM ether onto a benzylic mesylate proceeds through a quinonoid intermediate or by direct S N 2 displacement. The synthesis of diastereomeric biologically active natural lignans is described utilizing this general methodology.
从 OMOM 醚分子内攻击到甲磺酸苄酯的四取代四氢呋喃的新闭环通过醌类中间体或通过直接 SN 2 置换进行。使用这种通用方法描述了非对映异构生物活性天然木脂素的合成。