1,3-Dipolar cycloaddition of unstabilised azomethine ylides by Lewis base catalysis
作者:Shveta Pandiancherri、Sarah J. Ryan、David W. Lupton
DOI:10.1039/c2ob26047f
日期:——
Lewis base catalysed 1,3-dipolarcycloaddition between α,β-unsaturated acyl fluorides and N-[(trimethylsilyl)methyl]amino ethers has been achieved using 1 mol% DMAP. Competition experiments and 19F-NMR studies indicate that the cycloaddition occurs preferentially between the α,β-unsaturated acyl fluoride and the unstabilised azomethine ylide. In addition, an enantioselective variant, using chiral isothiourea