Base-Mediated Tunable Synthesis of 2-Trifluoromethylated Furans and Dihydrofuranols: Extraordinary Stable in Sulfuric Acid
作者:Junwen Wang、Shouxiong Chen、Wei Wu、Shunli Wen、Zhiqiang Weng
DOI:10.1021/acs.joc.9b02326
日期:2019.12.6
2-Trifluoromethylated furans and dihydrofuranols were tunably synthesized from the cyclization of β-ketonitriles with 3-bromo-1,1,1-trifluoroacetone mediated by bases. In addition, dehydration of dihydrofuranol compounds with concentrated sulfuric acid gave another 2-(trifluoromethyl)furans isomer. The developed methodology exhibits an excellent functional group tolerance for both aromatic and aliphatic β-ketonitriles
由β-乙腈与3-溴-1,1,1-三氟丙酮的碱环合,可将β-酮腈环化而合成2-三氟甲基化的呋喃和二氢呋喃醇。另外,用浓硫酸使二氢呋喃醇化合物脱水,得到另一种2-(三氟甲基)呋喃异构体。所开发的方法对芳香族和脂肪族β-酮腈均具有出色的官能团耐受性。