A facile synthesis of tetrasubstituted 2,3-dihydrofuran derivatives using poly(ethylene glycol) as soluble support
作者:Chun Feng、Cuifen Lu、Zuxing Chen、Nianguo Dong、Jiawei Shi、Guichun Yang
DOI:10.1002/jhet.372
日期:——
A facile synthesis of tetrasubstitude 2,3-dihydrofurans has been conducted using poly(ethylene glycol) (PEG) as a soluble polymer support. The PEG-supported pyridinium ylides react with 3-arylidene-2,4-pentanedione in the presence of triethylamine (TEA) via conjugate addition to form PEG-supported dihydrofuran derivatives, being cleaved by 1% KCN/EtOH to afford trans-tetrasubstitude-2,3-dihydrofurans
使用聚(乙二醇)(PEG)作为可溶性聚合物载体,可以轻松合成四亚甲基2,3-二氢呋喃。PEG负载的吡啶鎓叶立德在三乙胺(TEA)存在下,通过共轭加成与3-芳基-2,4-戊二酮反应形成PEG负载的二氢呋喃衍生物,并被1%KCN / EtOH裂解,得到反-四取代- 2,3-二氢呋喃,产率从高到优。J.杂环化学。(2010)。