All-carbon quaternary stereogenic centers by enantioselective Cu-catalyzed conjugate additions promoted by a chiral N-heterocyclic carbene
(Chemical Equation Presented) Necessity is the mother of invention: When the available catalysts do not cut it, a new one has to be developed. A chiral N-heterocyclic carbene (NHC) is used in the first catalytic asymmetric conjugate addition of alkyl- and
Brown, M. Kevin,May, Tricia L.,Baxter, Carl A.,Hoveyda, Amir H.
p. 1097 - 1100
(2008/03/15)
CHIRAL INDUCTION IN PHOTOCHEMICAL REACTIONS-V. REGIO- AND DIASTEREOSELECTIVITY IN THE PHOTOCHEMICAL CYCLOADDITION OF CHIRAL CYCLENONE-3-CARBOXYLATE WITH 1,1'-DIETHOXYETHENE
The chiral cyclenone-3-carboxylate 5-12 induce high regio - but only fair diastereoselectivities in the photochemical cycloaddition with 1,1'-diethoxyethene 23.Cyclohex-2-ene-1-one-3-carboxylates gain higher diastereoselectivites compared to the rin
Herzog, Heinz,Koch, Hartmut,Scharf, Hans-Dieter,Runsink, Jan
p. 3547 - 3558
(2007/10/02)
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