Hydrogen-Bond Acceptance of Bifunctional Ligands in an Alkyne−Metal π Complex
作者:Douglas B. Grotjahn、Valentín Miranda-Soto、Elijah J. Kragulj、Daniel A. Lev、Gülin Erdogan、Xi Zeng、Andrew L. Cooksy
DOI:10.1021/ja0774616
日期:2008.1.1
reactive alkyne pi complexes, intermediates in anti-Markovnikovalkynehydration by CpRu bis(phosphine) catalysts with heterocyclic substituents. Each heterocycle accepts a hydrogen bond from an acetylene C-H, as revealed by NMR coupling constants between alkyne 13C and 1H nuclei as well as between alkyne 13C and pyridine 15N (2hJCN). Moreover, further alkyne transformations occur at temperatures from