between arylboronic acids and alkynylcopper reagents. Upon simple addition of 1,10-phenanthroline in the presence of oxygen, these highly stable, readily available polymeric reagents are easily activated and transfer their alkynyl group after subsequent transmetallation with the boronic acid. These results further expand the oxidative chemistry of organocopper compounds together with providing a user-friendly
Mono- and Bimetallic Alkynyl Metallocenes and Half-Sandwich Complexes: A Simple and Versatile Synthetic Approach
作者:Carolina Valderas、Leyre Marzo、María C. de la Torre、José Luis García Ruano、José Alemán、Luis Casarrubios、Miguel A. Sierra
DOI:10.1002/chem.201603462
日期:2016.10.24
A general process for the synthesis of alkynyl mono and dimetallic metallocenes and half‐sandwich complexes has been developed. This approach uses the addition of lithium derivatives of sandwich or half‐sandwich complexes to arylsulfonylacetylenes. The reaction occurs in two steps (lithiation and anti‐Michael addition to alkynylsulfone followed by elimination of the ArSO2 moiety) to form the corresponding