Studies toward the Total Synthesis of Arylnaphthalene Lignans via a Photo-Dehydro-Diels–Alder (PDDA) Reaction
作者:Pablo Wessig、Dominik Badetko、Maciej Czarnecki、Lukas Wichterich、Peter Schmidt、Cosima Brudy、Eric Sperlich、Alexandra Kelling
DOI:10.1021/acs.joc.2c00195
日期:2022.5.6
An efficient method for the preparation of arylnaphthalene lignans (ANLs) was developed, which is based on the Photo-Dehydro-Diels–Alder (PDDA) reaction. While intermolecular PDDA reactions turned out to be inefficient, the intramolecular variant using suberic acid as tether linking two aryl propiolic esters smoothly provided naphthalenophanes. The irradiations were performed with a previously developed
开发了一种基于 Photo-Dehydro-D iels –Alder ( PDDA ) 反应制备芳基萘木脂素 (ANLs) 的有效方法。虽然分子间 PDDA 反应被证明是低效的,但使用辛二酸作为连接两个芳基丙醇酯的系链的分子内变体顺利地提供了萘酚。使用先前开发的环形连续流动反应器和 UVB 灯进行辐照。这样就可以制备出天然产物Alashinol D、Taiwanin C和一种未命名的ANL。