Total Synthesis of the Plant Growth Promoter Auxofuran Featuring a Gold(I) Catalyzed Furan Formation
作者:Sibylle Riedel、Martin E. Maier
DOI:10.1021/acs.joc.0c00408
日期:2020.6.19
A concise synthesis of auxofuran (1) was developed. Starting with a Sonogashira cross-coupling reaction, enynol (10) was prepared. A gold(I) catalyzed cycloisomerization led to disubstituted furan 12. Via an intramolecular Friedel–Crafts cyclization, a dihydrobenzofuranone was obtained. Functional group manipulations, including benzylic oxidation, led to the target molecule.
开发了一种简洁的合成辅助剂(1)。从Sonogashira交叉偶联反应开始,制备了烯醇(10)。金(I)催化环异构化导致二取代的呋喃12。通过分子内Friedel-Crafts环化,获得了二氢苯并呋喃酮。官能团的操作(包括苄基氧化)导致产生目标分子。