Effects of haloniums on gold-catalyzed ring expansion of 1-oxiranyl-1-alkynylcyclopropanes.
We observed distinct chemoselectivities for the gold-catalyzed transformation of cis-1-oxiranyl-1-alkynylcyclopropanes 1 into various halogenated products in the presence of suitable Au(III) catalysts and N-halosuccinimide (halo = chloro, bromo and iodo).
Department of Chemistry, National Tsing-Hua University, Hsinchu, Taiwan, ROC.
Hsuan-Hung
HH
Liao
Rai-Shung
RS
Liu