A Catalytic Intermolecular Formal Ene Reaction between Ketone-Derived Silyl Enol Ethers and Alkynes
作者:Stephen D. Holmbo、Nicole A. Godfrey、Joshua J. Hirner、Sergey V. Pronin
DOI:10.1021/jacs.6b06847
日期:2016.9.28
A catalytic formal ene reaction between ketone-derived silylenolethers and terminal alkynes is described. This transformation is uniquely capable of bimolecular assembly of 2-siloxy-1,4-dienes and can be used to access β,γ-unsaturated ketones containing quaternary carbons in the α-position.
Asymmetric Conjugate Addition of Silyl Enol Ethers Catalyzed by Tethered Bis(8-quinolinolato) Aluminum Complexes
作者:Norito Takenaka、Joshua P. Abell、Hisashi Yamamoto
DOI:10.1021/ja0668320
日期:2007.1.1
aluminum(III) complexes effectively catalyze the highly enantioselective Mukaiyama−Michael reaction of silyl enol ethers, including tetrasubstituted enolates that give rise to enantioenriched α-carbonyl all-carbon-substituted quaternary stereocenters. The present catalyst also promotes the conjugate addition of N-benzylindole to α,β-unsaturated acylphosphonates with high enantioselectivity (indole Friedel−Crafts