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Tomoya Yamamura, Hiroshi Nakatsuka, Shinji Tanaka and Prof. Dr. Masato Kitamura Asymmetric Hydrogenation of tert-Alkyl Ketones: DMSO Effect in Unification of Stereoisomeric Ruthenium Complexes Angewandte Chemie International Edition 52

Version of Record online: 10 JUL 2013 | DOI: 10.1002/anie.201304408

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Face off: The ruthenium complexes of a new axially chiral PNN ligand (L) are highly efficient in the presence of dimethylsulfoxide (DMSO) for hydrogenation of both functionalized and unfunctionalized tert-alkyl ketones. DMSO is thought to narrow down the many possible complex stereoisomers into a single facial L/Ru complex, thus enhancing the reactivity, selectivity, and productivity.

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