基于炔基亚砜与炔酰胺/炔醚的交叉偶联/[3,3]-硫鎓离子重排串联策略构筑四取代呋喃
Cascade Cross-Coupling/[3,3]-Sulfonium Rearrangement of Alkynyl Sulfoxides and Ynamides/Ynol Ethers to Construct Tetrasubstituted Furans
孟书玉 1郭闻涛 1王全瑞1
作者信息
摘要
报道了一种无需过渡金属催化的四取代呋喃类化合物的合成策略.在三氟化硼乙醚络合物的作用下,炔基亚砜与炔酰胺或炔醚发生反应,经交叉偶联、[3,3]-硫鎓离子重排和5-exo-dig杂环化关环的串联步骤生成四取代呋喃.产物中呋喃环α-位的烷硫基可通过进一步后修饰反应,转化为所需的其它烷基或芳基取代基.
Abstract
A transition-metal-free strategy for the synthesis of tetrasubstituted furans is reported.Promoted by boron trifluo-ride diethyl etherate,the reaction of alkynyl sulfoxides with ynamides/ynol ethers proceeded via a cascade process including cross-coupling of the two reactants,[3,3]-sulfonium rearrangement,and 5-exo-dig heterocyclization,leading to tetrasubstituted furan products.The resultant α-alkylthio groups can be used for further functionalization,such as to introduce other alkyl/aryl groups.
关键词
杂环化/[3,3]-重排/硫鎓离子/串联反应/四取代呋喃Key words
heterocyclization/[3,3]-rearrangement/sulfonium ion/tandem reaction/tetrasubstituted furan引用本文复制引用
出版年
2024
NETL
NSTL
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