Palladium-catalyzed conjugate addition type reaction of (2-hydroxyaryl)mercury chlorides with .alpha.,.beta.-unsaturated ketones in a two-phase system. A new synthesis of 2-chromanols and 2-chromenes
Michael Additions of Highly Basic Enolates to <i>ortho</i>-Quinone Methides
作者:Robert S. Lewis、Christopher J. Garza、Ann T. Dang、Te Kie A. Pedro、William J. Chain
DOI:10.1021/acs.orglett.5b00972
日期:2015.5.1
which ketone or esterenolates and ortho-quinone methides (o-QMs) are generated in situ in a single reaction flask from silylated precursors under the action of anhydrous fluoride is reported. The reaction partners are joined to give a variety of β-(2-hydroxyphenyl)-carbonyl compounds in 32–94% yield in a single laboratory operation. The intermediacy of o-QMs is supported by control experiments utilizing
Palladium-catalyzed conjugate addition type reaction of (2-hydroxyaryl)mercury chlorides with .alpha.,.beta.-unsaturated ketones in a two-phase system. A new synthesis of 2-chromanols and 2-chromenes