Cyclohexane-1,2-diamines: Efficient catalysts for the enantioselective conjugate addition of ketones to Nitro Olefins
Simple monosulfonated cyclohexane-1,2-diamines are highly enantioselective organocatalysts for the conjugate addition of ketones to nitro olefins. By focusing on aromatic ketones as the most challenging substrates, selectivities of up to 98 % ee can be ac
Rasappan, Ramesh,Reiser, Oliver
supporting information; experimental part
p. 1305 - 1308
(2009/08/07)
Synthesis of homochiral pentadentate sulfonamide-based ligands
A two-step synthesis of pentadentate, tetraionic ligands based on sulfonamide, amide, and pyridyl groups is reported. These ligands are easily accessible in good to excellent yield from commercially available materials.
Ng, Karno,Somanathan, Ratnasamy,Walsh, Patrick J.
p. 1719 - 1722
(2007/10/03)
New efficient catalysts for enantioselective transfer hydrogenations
New C2-symmetrical diaminoferrocenyl derivatives 3 and 2-amino(sulfonamido)cyclohexanes 4 were found to be highly active ligands for the ruthenium catalyzed asymmetric transfer hydrogenation of ketones. Contrary to many existing catalytic syste
Puentener, Kurt,Schwink, Lothar,Knochel, Paul
p. 8165 - 8168
(2007/10/03)
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