Lewis acid-catalyzed Meyer–Schuster reactions: methodology for the olefination of aldehydes and ketones
作者:Douglas A. Engel、Susana S. Lopez、Gregory B. Dudley
DOI:10.1016/j.tet.2008.02.030
日期:2008.7
In principle, the most efficient and atom-economical means of converting an aldehyde or ketone into the homologated α,β-unsaturatedester is through addition/rearrangement sequences involving acetylenic π-bonds (Scheme 1). Implementation of such a strategy for the synthesis of α,β-unsaturatedesters is presented: addition of ethoxyacetylene followed by scandium(III) triflate-catalyzed Meyer–Schuster