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The method uses a ThDP-dependent enzyme YerE, the O-antigen of Yersinia pseudotuberculosis O:VI.
The difficult asymmetric hydrogenation of the conjugated double bond in α,β-unsaturated nitriles is achieved using a chiral Ir/N,P-ligand complex in the presence of iPr2NEt.
The asymmetric hydrogenation of dimethyl maleates, some dimethyl fumarates as well as dimethyl maleate/fumarate mixtures are investigated using a novel Ir-complex as catalyst.
Asymmetric hydrogenation of maleic and fumaric acid derivatives with iridium catalysts based on N,P ligands provides an efficient route to chiral enantioenriched succinates. A new catalyst derived… (More)
Unprecedented enantioselectivities are obtained in the hydrogenation of α-substituted α,β-unsaturated esters and dihydronaphthalenes.
Although many chiral catalysts are known that allow highly enantioselective hydrogenation of a wide range of olefins, no suitable catalysts for the asymmetric hydrogenation of α,β-unsaturated… (More)