Chelation-Assisted Hydroesterification of Alkenes: New Ruthenium Catalyst Systems and Ligand Effects
作者:Bin Li、Seungeon Lee、Kwangmin Shin、Sukbok Chang
DOI:10.1021/ol500579n
日期:2014.4.4
New types of ruthenium catalysts were developed for the chelation-assisted intermolecular olefin hydroesterification that employs 2-pyridylmethyl formate as an ester source. Two classes of ligands, NHCs and phosphines, were found to facilitate the reaction delivering isomeric ester products (linear versus branched) with different ratios, thus allowing access to ligand-guided selective hydroesterification
The hydroesterification of alkenes with 2-pyridylmethanol (1) catalyzed by Rh-4(CO)(12) is described. The reaction is accelerated by the presence of a pyridine ring in the alcohol 1. The reaction is applicable to various alkenes, both terminal and internal alkenes.