Results 261 to 270 of about 149,811 (326)

Chiral Brønsted-Acid-Catalyzed Asymmetric Oxidation of Sulfenamide by Using H2O2: A Versatile Access to Sulfinamide and Sulfoxide with High Enantioselectivity

ACS Catalysis, 2019
Herein, we describe an example of catalytic asymmetric synthesis of sulfinamides. Aromatic sulfenamides were chosen as useful substrates, because of the indispensable N–H bond, which could form an efficient hydrogen bond with chiral phosphoric acid. H2O2
LongJian Ma, Shu-sen Chen, Guang-xun Li, Jin Zhu, Qi-Wei Wang, Zhuo Tang   +5 more
semanticscholar   +1 more source

Enzymatic Pictet-Spengler Reaction: Computational Study of the Mechanism and Enantioselectivity of Norcoclaurine Synthase.

Journal of the American Chemical Society, 2019
The Pictet-Spengler (PS) reaction, i.e., the acid-catalyzed condensation between β-arylethylamine and an aldehyde or a ketone and the subsequent ring closure, is an important reaction in organic chemistry. A number of enzymes (called Pictet-Spenglerases,
X. Sheng, F. Himo
semanticscholar   +1 more source

Enantioselective polyene cyclizations

Organic & Biomolecular Chemistry, 2016
A comprehensive review covering the field of enantioselective polyene cyclizations.
Chad N, Ungarean, Emma H, Southgate, David, Sarlah   +2 more
openaire   +2 more sources

Gas-phase enantioselectivity

International Journal of Mass Spectrometry, 2000
Abstract Determination of the intrinsic noncovalent interactions governing chiral recognition in diastereomeric complexes constitutes the basis for understanding information transfer between molecules in living systems as well as in synthetic supramolecular structures.
FILIPPI, Antonello, GIARDINI, Anna, PICCIRILLO S., SPERANZA, Maurizio   +3 more
openaire   +2 more sources

Enantioselective cooperative catalysis

Organic & Biomolecular Chemistry, 2015
This review focuses on enantioselective cooperative catalytic reactions, wherein two catalysts work simultaneously to form products which cannot be obtained by the use of a single catalyst alone, which have attracted considerable attention in recent years.
Suleman M, Inamdar, Valmik S, Shinde, Nitin T, Patil   +2 more
openaire   +2 more sources

Organocatalytic enantioselective desymmetrisation

Chem. Soc. Rev., 2016
Organocatalytic enantioselective desymmetrisation of achiral or meso compounds is a powerful strategy for the construction of enantiomerically enriched complex molecules, often with multiple stereocentres and in high selectivities. Recent years have seen increasing use of organocatalysts in desymmetrisation methodology, in contrast to traditional metal-
A, Borissov, T Q, Davies, S R, Ellis, T A, Fleming, M S W, Richardson, D J, Dixon   +5 more
openaire   +2 more sources

Catalytic Enantioselective Oxaziridination

Journal of the American Chemical Society, 2011
The first catalytic enantioselective synthesis of oxaziridines is presented. The oxidation of aryl and alkyl aldimines with m-CPBA under organocatalytic conditions using cinchona alkaloid-derived catalysts furnished optically active oxaziridines in good yields and high enantioselectivities (up to 94% ee).
Lykke, Lennart, Esrich, Carlos Rodriguez, Jørgensen, Karl Anker   +2 more
openaire   +2 more sources

Enantioselective Radical Processes

ChemInform, 2003
AbstractFor Abstract see ChemInform Abstract in Full Text.
Mukund P, Sibi, Shankar, Manyem, Jake, Zimmerman   +2 more
openaire   +2 more sources

Enantioselective Halogenation Reactions

ChemInform, 2004
AbstractFor Abstract see ChemInform Abstract in Full Text.
Hasim Ibrahim, Antonio Togni
openaire   +1 more source

Enantioselective Phosphine Organocatalysis

Synlett, 2009
The broad potential synthetic usefulness of phosphine-promoted reactions has stimulated many recent investigations on enantioselective variants of known reactions of this family, as well as the search for new, specifically designed, chiral phosphorus catalysts.
Marinetti, A., Voituriez, A.
openaire   +1 more source