SDS of cas: 172418-32-5. Aromatic heterocyclic compounds can also be classified according to the number of heteroatoms contained in the heterocycle: single heteroatom, two heteroatoms, three heteroatoms and four heteroatoms. Compound: trans-Di-μ-acetatobis[2-[bis(2-methylphenyl)phosphino]benzyl]dipalladium, is researched, Molecular C46H46O4P2Pd2, CAS is 172418-32-5, about Palladium-catalyzed reactions in industry. 5. First efficient palladium-catalyzed Heck reactions of aryl bromides with alkyl methacrylate. Author is Beller, Matthias; Riermeier, Thomas H..
An efficient palladium-catalyzed coupling reaction of aryl bromides with Bu methacrylate was developed. Depending on the reaction conditions various amounts of 2-methyl-3-phenyl-2-propenoic acid Bu ester and 2-(phenylmethyl)-2-propenoic acid Bu ester 2-(phenylmethylene)benzenepropanoic acid Bu ester were produced. Superior turn over numbers up to 8300 and turn over frequencies up to 1000 h-1 for Heck reactions of aryl bromides with methacrylic acid ester have been obtained for the first time. The Heck reaction were carried out in the presence of less than the stoichiometric amount of base. The influence of the base (sodium acetate or tributylamine) on the regioselectivity of the Heck reaction was studied.
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Reference:
Phosphine ligand,
Chiral phosphine ligands in asymmetric synthesis. Molecular structure and absolute configuration of (1,5-cyclooctadiene)-(2S,3S)-2,3-bis(diphenylphosphino)butanerhodium(I) perchlorate tetrahydrofuran solvate