J
Jack Halpern
Researcher at University of Chicago
Publications - 194
Citations - 8261
Jack Halpern is an academic researcher from University of Chicago. The author has contributed to research in topics: Catalysis & Cobalt. The author has an hindex of 48, co-authored 194 publications receiving 7971 citations.
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Asymmetric hydrogenation of methyl (Z)-.alpha.-acetamidocinnamate catalyzed by [1,2-bis(phenyl-o-anisoyl)phosphino)ethane]rhodium(I): kinetics, mechanism and origin of enantioselection
Clark R. Landis,Jack Halpern +1 more
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Mechanisms of coenzyme B12-dependent rearrangements.
TL;DR: The only role thus far identified for coenzyme B12 in these reactions--namely, that of a free radical precursor--reflects the weakness, and facile dissociation, of the cobalt-carbon bond.
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Mechanism and stereoselectivity of asymmetric hydrogenation.
TL;DR: It is concluded that the stereoselection is dictated not by the preferred initial binding of the substrate to the chiral catalyst, but rather by the much higher reactivity of the minor diastereomer of the catalyst-substrate adduct corresponding to the less favored binding mode.
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