Synthesis and activity for ROMP of bidentate Schiff base substituted second generation Grubbs catalysts
摘要:
The synthesis and characterisation of Schiff base substituted second generation Grubbs catalysts is described using the pyridine functionalised second generation catalyst and a Schiff base-TI salt. The complexes are less active for the ROMP of COD (cycloocadiene) than their second generation analogues though their activity for the ROMP of DCPD (dicyclopentadiene) at high temperatures shows great potential due to the thermal stability of the catalysts. (c) 2006 Elsevier B.V. All rights reserved.
Synthesis and Characterization of New Ruthenium-Based Olefin Metathesis Catalysts Coordinated with Bidentate Schiff-Base Ligands
摘要:
A novel series of Schiff-base-substituted ruthenium carbene complexes have been prepared by the treatment of RuCl2(=CHPh)(PCy3)(2) with a variety of Schiff-base ligands as the thallium salts. Modification of the Schiff-base electronic and/or structural substituents allowed for the tuning of the complexes activities in olefin metathesis reactions. The structures of the complexes were unambiguously characterized by NMR studies and X-ray analysis. These newly prepared complexes are highly stable to air, moisture, and temperature and even exhibit catalytic activity in polar protic solvents.
[EN] METAL COMPLEXES FOR USE IN OLEFIN METATHESIS AND ATOM GROUP TRANSFER REACTIONS<br/>[FR] COMPLEXES METALLIQUES S'UTILISANT DANS LA METATHESE D'OLEFINE ET LES REACTIONS DE TRANSFERT D'ATOMES OU DE GROUPES