Showing papers by "Daniel P. Sanders published in 2005"
TL;DR: 1,4-Benzoquinones have been found to prevent olefin isomerization of a number of allylic ethers and long-chain aliphatic alkenes during ruthenium-catalyzed Olefin metathesis reactions, and this mild, inexpensive, and effective method increases the synthetic utility of olefins via improvement of overall product yield and purity.
Abstract: 1,4-Benzoquinones have been found to prevent olefin isomerization of a number of allylic ethers and long-chain aliphatic alkenes during ruthenium-catalyzed olefin metathesis reactions. Electron-deficient benzoquinones are the most effective additives for the prevention of olefin migration. This mild, inexpensive, and effective method to block olefin isomerization increases the synthetic utility of olefin metathesis via improvement of overall product yield and purity.
558 citations
Patent•
29 Mar 2005TL;DR: In this paper, an N-heterocyclic carbene ligand with a Group 8 transition metal center was proposed for catalyzing ring closing metathesis of acyclic olefins.
Abstract: The invention provides novel organometallic complexes useful as olefin metathesis catalysts. The complexes have an N-heterocyclic carbene ligand and a chelating carbene ligand associated with a Group 8 transition metal center. The molecular structure of the complexes can be altered so as to provide a substantial latency period. The complexes are particularly useful in catalyzing ring closing metathesis of acyclic olefins and ring opening metathesis polymerization of cyclic olefins.
37 citations