The first intramolecular silene Diels–Alder reactions
作者:Michal Czyzewski、Jonathan D. Sellars、Tamaz Guliashvili、Julius Tibbelin、Lisa Johnstone、Justin Bower、Matthew Box、Robert D. M. Davies、Henrik Ottosson、Patrick G. Steel
DOI:10.1039/c3cc49526d
日期:——
The synthesis of silaheterocycles through the first examples of an intramolecular silene DielsâAlder reaction is described.
描述了通过首次实例的分子内硅烯Diels-Alder反应合成硅杂环化合物。
Catalytic Asymmetric Vinylogous Prins Cyclization: A Highly Diastereo- and Enantioselective Entry to Tetrahydrofurans
作者:Youwei Xie、Gui-Juan Cheng、Sunggi Lee、Philip S. J. Kaib、Walter Thiel、Benjamin List
DOI:10.1021/jacs.6b09129
日期:2016.11.9
cyclization. This reaction constitutes an efficient approach for highly diastereo- and enantioselective synthesis of tetrahydrofurans (THFs) and is catalyzed by a confined chiral imidodiphosphoric acid (IDP). Aromatic and heteroaromatic aldehydes react with various 3,5-dien-1-ols to afford 2,3-disubstituted THFs in excellent selectivity (d.r. > 20:1, e.r. up to 99:1). Aliphatic aldehydes react with similarly