4071-58-3Relevant articles and documents
Formal (3+3) cycloaddition of silyl enol ethers catalyzed by trifric imide: Domino michael addition-claisen condensation accompanied with isomerization of silyl enol ethers
Azuma, Takumi,Takemoto, Yoshiji,Takasu, Kiyosei
scheme or table, p. 1190 - 1193 (2011/10/09)
We describe here a Tf2NH-catalyzed formal (3+3) cycloaddition of silyl enol ethers with acrylates as a new domino reaction. In the domino sequence, the catalyst activates Michael addition, deprotonation of the resulting silyloxonium cation and
Lewis Acid Catalysed Michael-type Addition. A New Regio- and Diastereoselective Annulation Method using Methyl Vinyl Ketone
Duhamel, Pierre,Dujardin, Gilles,Hennequin, Laurent,Poirier, Jean-Marie
, p. 387 - 396 (2007/10/02)
A new annulation method is presented, involving a boron trifluoride catalysed Michael addition of trialkylsilyl enol ethers to methyl vinyl ketone (MVK) in the presence of a hydroxylic compound.This methodology allows regiospecific 3-oxobutylation of eith
Organotin triflates as functional Lewis acids. A new entry to simple and efficient Robinson annulation
Sato, Tsuneo,Wakahara, Yoshiyuki,Otera, Junzo,Nozaki, Hitosi
, p. 1581 - 1584 (2007/10/02)
An efficient Robinson annulation has been established through the Michael addition of enol silyl ethers to α-enones catalyzed by dibutyltinbis(triflate) followed by the MeONa-mediated intramolecular aldol condensation of the adducts.