Química Nova, 2009 The philosophy of organocatalysis is based on the utilization of organic compounds to catalyze organic transformations without the intervention of metals.
Giovanni W. Amarante, Fernando Coelho
doaj +1 more source
Hydrophobically directed aldol reactions: polystyrene-supported L-proline as a recyclable catalyst for direct asymmetric aldol reactions in the presence of water [PDF]
, 2007 A simple synthetic methodology for the preparation of a polystyrene- supported L-proline material is reported, and this material has been used as catalyst in direct asymmetric aldol reactions between several ketones and arylaldehydes to furnish aldol
Akagawa +94 more
core +1 more source
Neutral sp2–sp3 Diboranes: Structures, Reactivities, and Applications in Organic Synthesis
European Journal of Organic Chemistry, EarlyView.Neutral sp2–sp3 diboranes, featuring a polarized BB single bond between distinct sp2‐ and sp3‐hybridized boryl groups, possess unique structures and reactivity. Their properties have attracted significant research interest. This review explores the chemistry of neutral sp2–sp3 diboranes, highlighting recent progress in their syntheses, structural ...
Zhiqing Liu, Hairong Lyu
wiley +1 more source
How cinchona alkaloid-derived primary amines control asymmetric electrophilic fluorination of cyclic ketones. [PDF]
, 2014 The origin of selectivity in the α-fluorination of cyclic ketones catalyzed by cinchona alkaloid-derived primary amines is determined with density functional calculations.
Houk, KN, Lam, Yu-hong
core +2 more sources
Volume inequalities for asymmetric Orlicz zonotopes [PDF]
arXiv, 2015 In this paper, we deal with the asymmetric Orlicz zonotopes by using the method of shadow system. We establish the volume product inequality and volume ratio inequality for asymmetric Orlicz zonotopes, along with their equality cases.
arxiv
Enantioselective Anion‐Binding‐Catalyzed Nucleophilic Addition to 4‐Quinolones
European Journal of Organic Chemistry, EarlyView.The first organocatalytic enantioselective formal 1,4‐addition to 4‐quinolones has been developed. This method relies on chiral triazole‐based anion‐binding catalysis using enol nucleophiles, complementing previous metal catalytic approaches. Moderate to good yields and enantioselectivities were achieved by in situ silylation and formation of a key ...
Martin Aleksiev +2 more
wiley +1 more source
Renewal theory for asymmetric $U$-statistics [PDF]
arXiv, 2018 We extend a functional limit theorem for symmetric $U$-statistics [Miller and Sen, 1972] to asymmetric $U$-statistics, and use this to show some renewal theory results for asymmetric $U$-statistics. Some applications are given.
arxiv
Enantioselective Desymmetrization of Bisphenol Derivatives by Organocatalytic Sulfonylation
European Journal of Organic Chemistry, EarlyView.An efficient organocatalytic strategy involving the desymmetrization–sulfonylation of bisphenols is introduced for the synthesis of chiral 1,1‐diarylalkanes. A chiral thiourea catalyst enables the selective sulfonylation of one hydroxyl group with a sulfonyl chloride in a CHCl3/H2O system under basic conditions, affording the reaction products with ...
Judit Hostalet‐Romero +6 more
wiley +1 more source
1,3-Dicarbonyl compounds in stereoselective domino and multicomponent reactions
, 2010 International audienceModern organic synthesis focuses on the discovery and the development of stereoselective multiple bond-forming transformations allowing the creation of several covalent bonds in a single operation.
Bonne, Damien +3 more
core +3 more sources
Asymmetric vinylogous Mukaiyama aldol reaction of isatins under bifunctional organocatalysis: Enantioselective synthesis of substituted 3-hydroxy-2-oxindoles [PDF]
, 2018 A highly enantioselective organocatalytic vinylogous Mukaiyama aldol reaction of silyloxy dienes and isatins under bifunctional organocatalysis is presented. Substituted 3-hydroxy-2-oxindoles are synthesised in good yields and enantioselectivities. These
Alemán, José +3 more
core +2 more sources