Chiral Bronsted Acid-Catalyzed Enantioselective alpha-Amidoalkylation Reactions: A Joint Experimental and Predictive Study, [PDF]
, 2016 Enamides with a free NH group have been evaluated as nucleophiles in chiral Bronsted acid-catalyzed enantioselective alpha-amidoalkylation reactions of bicyclic hydroxylactams for the generation of quaternary stereocenters.
Aranzamendi Uruburu, Eider +4 more
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One-pot asymmetric cyclocarbohydroxylation sequence for the enantioselective synthesis of functionalised cyclopentanes [PDF]
, 2010 International audienceA new method has been developed for the enantioselective synthesis of highly functionalised cyclopentanes bearing up to three stereogenic centres with very high stereoselectivity.
Bonne, Damien +4 more
core +3 more sources
A quantitative approach to nucleophilic organocatalysis
Beilstein Journal of Organic Chemistry, 2012 The key steps in most organocatalytic cyclizations are the reactions of electrophiles with nucleophiles. Their rates can be calculated by the linear free-energy relationship log k(20 °C) = sN(E + N), where electrophiles are characterized by one parameter
Herbert Mayr +3 more
doaj +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 +4 more sources
Radical Fluoroalkylation Reactions [PDF]
, 2018 Recent protocols and reactions for catalytic radical perfluoroalkylations will be described. The production of perfluoroalkyl radicals (RF = CnF2n+1, n ≥ 2), which effect both addition and substitution reactions on organic substrates, can be realized ...
Barata Vallejo, Sebastian +2 more
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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
Beilstein Journal of Organic Chemistry, 2016 Hydrogen bond donor catalysis represents a rapidly growing subfield of organocatalysis. While traditional hydrogen bond donors containing N–H and O–H moieties have been effectively used for electrophile activation, activation based on other types of non ...
Pavel Nagorny, Zhankui Sun
doaj +1 more source
Cinchona-Derived Picolinamides: Effective Organocatalysts for Stereoselective Imine Hydrosilylation [PDF]
, 2014 Picolinamide-cinchona organocatalysts for the successful enantioselective reduction of ketomines were developed. For the first time, a new type of chiral Lewis base, a cationic species, is reported to efficiently organocatalyze the addition of ...
Andrea, Genoni +3 more
core +1 more source
Proposal : Organokatalysatoren für die fluorige biphasische Katalyse ; Möglichkeiten der homogenen Katalyse mit anschließendem Katalysator‐Recycling [PDF]
, 2006 Übertragung des Konzeptes der fluorigen biphasischen Systeme bzw. Übergangsmetallkatalyse auf die fluorige biphasische Organokatalyse. Entwicklung neuer Organokatalysatoren für dieses neuartige Katalysekonzept auf der Basis bereits bekannter Taddol ...
Koenigs, Rene M.
core
Tetrahedron ChemChiral Lewis base (LB) organocatalysis has emerged as a powerful covalent catalysis concept which allows for highly selective asymmetric C–C and C-heteroatom bond formations.
Magdalena Piringer +5 more
doaj +1 more source