Prostereogenic Face and Orientation Selective Oxidative Coupling Reaction between Methyl Methacrylate and 2,5-Dihydrofuran Catalyzed by a Ruthenium(0) Compound
摘要:
We disclose the first prostereogenic face and orientational control of coordinated olefins in an oxidative coupling reaction at a transition-metal center. Chemo-, regio-, and diastereoselective cross-dimerization between methyl methacrylate (MMA) and 2,5-dihydrofuran is catalyzed by Ru(eta(6)-naphthalene)(eta(4)-1,5-COD) (1; S mol %) at 0 degrees C in 24 h without use of solvent to give methyl rac-(2S)-3-[(3R)-2,3-dihydrofuran-3-yl]-2-methy1propionate (2a) in 81% yield.
Prostereogenic Face and Orientation Selective Oxidative Coupling Reaction between Methyl Methacrylate and 2,5-Dihydrofuran Catalyzed by a Ruthenium(0) Compound
摘要:
We disclose the first prostereogenic face and orientational control of coordinated olefins in an oxidative coupling reaction at a transition-metal center. Chemo-, regio-, and diastereoselective cross-dimerization between methyl methacrylate (MMA) and 2,5-dihydrofuran is catalyzed by Ru(eta(6)-naphthalene)(eta(4)-1,5-COD) (1; S mol %) at 0 degrees C in 24 h without use of solvent to give methyl rac-(2S)-3-[(3R)-2,3-dihydrofuran-3-yl]-2-methy1propionate (2a) in 81% yield.
New Ru(0)-naphthalene complexes containing a bicyclononadiene ligand catalyze the linear cross-dimerization between methyl methacrylate and substituted alkenes by an oxidative coupling mechanism. The chiral (S,S)-2-methylbicyclo[3.3.1]nona-2,6-diene complex (S,5)-1b catalyzes asymmetric linear cross-dimerization between methyl methacrylate and 2,5-dihydrofuran to give the cross-dimer In 74% yield In 80% ee.
Prostereogenic Face and Orientation Selective Oxidative Coupling Reaction between Methyl Methacrylate and 2,5-Dihydrofuran Catalyzed by a Ruthenium(0) Compound
We disclose the first prostereogenic face and orientational control of coordinated olefins in an oxidative coupling reaction at a transition-metal center. Chemo-, regio-, and diastereoselective cross-dimerization between methyl methacrylate (MMA) and 2,5-dihydrofuran is catalyzed by Ru(eta(6)-naphthalene)(eta(4)-1,5-COD) (1; S mol %) at 0 degrees C in 24 h without use of solvent to give methyl rac-(2S)-3-[(3R)-2,3-dihydrofuran-3-yl]-2-methy1propionate (2a) in 81% yield.