Room temperature syntheses of entirely diverse substituted β-fluorofurans
作者:Yan Li、Kraig A. Wheeler、Roman Dembinski
DOI:10.1039/c1ob06693e
日期:——
Synthesis of highlysubstituted 3-fluorofurans is reported. The sequence began with preparation of tert-butyldimethylsilyl alk-1-en-3-yn-1-yl ethers from 1,4-disubstituted alk-3-yn-1-ones. Subsequent fluorination of alkenynyl silyl ethers with Selectfluor gave 2-fluoroalk-3-yn-1-ones in almost quantitative yield. Subsequent 5-endo-dig cyclizations using chlorotriphenylphosphine gold(I)/silver trif