Lithium perchlorate catalyzed conjugate addition of o-silylated ketene acetals to hindered α,β-unsaturated carbonyl compounds at atmospheric pressure
作者:Paul A. Grieco、R.J. Cooke、Kenneth J. Henry、James M. VanderRoest
DOI:10.1016/s0040-4039(00)92276-7
日期:1991.1
O-Silylated ketene acetals undergo 1,4 conjugate addition to hindered α,β-unsaturated carbonyl systems at atmospheric pressure in the presence of lithium perchlorate.
Lithium Cobalt-Bis-Dicarbollide: A Novel Lewis Acid Catalyst for the Conjugate Addition of Silyl Ketene Acetals to Hindered .alpha.,.beta.-Unsaturated Carbonyl Compounds
作者:William J. DuBay、Paul A. Grieco、Lee J. Todd
DOI:10.1021/jo00102a009
日期:1994.11
The novel Lewis acid, lithium cobalt-bis-dicarbollide (1), in which the lithium ion is weakly coordinated to the Co(B9C2H11)(2)(1-)anion, is an effective, soluble catalyst for Mukaiyama-Michael reactions.