The azidomethylene protecting group allows the synthesis of unstable phenolic compounds which are used as quinonemethideprecursors in the alkylations of alcohols, phenols, azide, thiophenol, amines, enols and enolates.
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