Asymmetric Claisen Rearrangements Enabled by Catalytic Asymmetric Di(allyl) Ether Synthesis
作者:Scott G. Nelson、Kan Wang
DOI:10.1021/ja058172p
日期:2006.4.5
Merging the catalyticasymmetricsynthesis of di(allyl) ethers with ensuing olefin isomerization-Claisen rearrangement (ICR) reactions provides a convenient, two-step route to asymmetric aliphatic Claisenrearrangements from easily obtained starting materials. These reactions deliver the 2,3-disubstituted 4-pentenal derivatives characteristic of aliphatic Claisenrearrangements with excellent relative
Strategies for Expanding Structural Diversity Available from Olefin Isomerization−Claisen Rearrangement Reactions
作者:Benjamin D. Stevens、Christopher J. Bungard、Scott G. Nelson
DOI:10.1021/jo0605851
日期:2006.8.1
for expanding the structural diversity available from olefin isomerization−Claisen rearrangement (ICR) reactions. Easily prepared allyl propargyl ethers undergo chemoselective Zr(IV)-catalyzed hydroboration to afford the boron-substituted ICR substrates. The boron-substituted allyl residue undergoes chemoselective Ir(I)-catalyzed olefinisomerization and in situ Claisen rearrangement to afford stereodefined