Efficient and stereoselective rearrangement catalyzed by only
one mole-percent gold(I) chloride/silver(I) trifluoromethanesulfonate
of Baylis-Hillman acetates afforded 2-(acetoxymethyl)alk-2-enoates
under mild reaction conditions in good to high yields with 100% E-selectivity. For cyclohex-2-enone-derived Baylis-Hillman
acetates, the reaction gave 2-alkylidenecyclohex-3-enones in good
yields.
gold/silver catalysis - stereoselectivity - rearrangements - Baylis-Hillman acetate - alk-2-enoates