127171-70-4Relevant articles and documents
Hydrogenation of Esters by Manganese Catalysts
Li, Xiao-Gen,Li, Fu,Xu, Yue,Xiao, Li-Jun,Xie, Jian-Hua,Zhou, Qi-Lin
, p. 744 - 749 (2022/01/13)
The hydrogenation of esters catalyzed by a manganese complex of phosphine-aminopyridine ligand was developed. Using this protocol, a variety of (hetero)aromatic and aliphatic carboxylates including biomass-derived esters and lactones were hydrogenated to primary alcohols with 63–98% yields. The manganese catalyst was found to be active for the hydrogenation of methyl benzoate, providing benzyl alcohol with turnover numbers (TON) as high as 45,000. Investigation of catalyst intermediates indicated that the amido manganese complex was the active catalyst species for the reaction. (Figure presented.).
The endocyclic restriction test: Determination of the transition-structure geometry for the transfer of oxygen from N,N-dialkylhydroxylamines to triarylphosphines
Kurtzweil, Mitchell L.,Loo, Dekai,Beak, Peter
, p. 421 - 427 (2007/10/02)
The transfers of oxygen from nitrogen to phosphorus in the conversions of 1 to 2 and 3 to 4 are shown by kinetic, solvent-labeling, and double-labeling criteria to be intramolecular reactions. This information in conjunction with the stabilities of 13 and 14 is taken to rule out the mechanisms of classic linear SN2 substitutions at oxygen or nitrogen, biphilic insertion, or a radical chain reaction and to favor reactions via a 10-P-5 species (18). These results appear to provide the first experimental demonstration that oxygen can be transferred at an oblique angle.
