Enantioselective oxidation of secondary alcohols catalyzed by soluble chiral polymeric [N ',N '',bis(salicylidene)ethane-1,2-diaminato(2-)]manganese(III) ([Mn-III(salen)] type complexes in a biphasic system

摘要

The polymeric [N',N'-bis(salicylidene)ethane-1,2-diaminato(2-)]manganese(III) ([Mn-III(salen)]) type complexes 1 and 2 were successfully applied to the oxidative kinetic resolution of secondary alcohols. The reaction proceeded readily at room temperature with excellent enantioselectivities of up to 99.9% ee. A variety of substrates, including aromatic and aliphatic alcohols, could be tolerated. The polymeric catalysts could easily be recovered and recycled.