posted on 2021-12-22, 14:34authored byQin Wang, Yan Shi, Xiaoli Huang, Yongzhuang Wang, Jiao Jiao, Yuhai Tang, Jing Li, Silong Xu, Yang Li
A highly efficient Ru(II)-catalyzed
regio- and stereospecific hydro-oxycarbonylation
of unsymmetrical internal alkynes bearing a difunctional 2-pyridyloxy
directing group with carboxylic acids has been developed, which provides
allylic (Z)-enol esters in good to excellent yields
with a broad substrate scope under mild conditions. The difunctional
directing group can be diversely derivatized, particularly undergoing
allylic substitution with various nucleophiles to afford β-functionalized
(Z)-enol esters without directing groups.