Results 51 to 60 of about 6,799 (217)

Chiral Diol-Based Organocatalysts in Enantioselective Reactions

open access: yesMolecules, 2018
Organocatalysis has emerged as a powerful synthetic tool in organic chemistry in the last few decades. Among various classes of organocatalysis, chiral diol-based scaffolds, such as BINOLs, VANOLs, and tartaric acid derivatives, have been widely used to ...
Truong N. Nguyen   +3 more
doaj   +1 more source

Organocatalysis and beyond: Activating reactions with two catalytic species [PDF]

open access: yes, 2019
Since the beginning of the millennium, organocatalysis has been gaining a predominant role in asymmetric synthesis and it is, nowadays, a foundation of catalysis.
Baschieri A.   +5 more
core   +2 more sources

Asymmetric Dearomative (3+2)-Cycloaddition Involving Nitro-Substituted Benzoheteroarenes under H-Bonding Catalysis

open access: yesMolecules, 2021
In our studies, the organocatalytic 1,3-dipolar cycloaddition between 2-nitrobenzofurans or 2-nitrobenzothiophene and N-2,2,2-trifluoroethyl-substituted isatin imines has been developed.
Maciej Saktura   +4 more
doaj   +1 more source

Organocatalysis in Confined Spaces

open access: yes, 2013
International audienceStrap in with organocatalysis: Organocatalysis can often give rise to unprecedented selectivities by encapsulation of the catalytic active site in an analogous manner as enzymes.
Rafael Gramage‐Doria   +5 more
core   +1 more source

Mechanochemistry assisted asymmetric organocatalysis: A sustainable approach

open access: yesBeilstein Journal of Organic Chemistry, 2012
Ball-milling and pestle and mortar grinding have emerged as powerful methods for the development of environmentally benign chemical transformations. Recently, the use of these mechanochemical techniques in asymmetric organocatalysis has increased.
Pankaj Chauhan, Swapandeep Singh Chimni
doaj   +1 more source

An Unexpected Inactivation of N-Heterocyclic Carbene Organic Catalyst by 1-Methylcyclopropylcarbaldehyde and 2,2,2-Trifluoroacetophenone

open access: yesFrontiers in Chemistry, 2022
An unprecedented inactivation process of the indanol-derived NHC catalysts bearing N-C6F5 groups is reported. An unexpected multi-cyclic complex product is obtained from the 3-component reaction with the 1-methylcyclopropyl-carbaldehyde, the 2,2,2 ...
Yanling Chen   +3 more
doaj   +1 more source

ORGANOCATÁLISE ENANTIOSSELETIVA: EVOLUÇÃO E ASPECTOS RECENTES

open access: yesQuímica Nova
In the last two decades, enantioselective organocatalysis has established itself as one of the three pillars of asymmetric catalysis. The rapid growth in the area is due to the rationalization of organocatalysis based on the generic modes of catalyst ...
Fernanda G. Finelli   +2 more
doaj   +1 more source

Organocatalyzed enantioselective desymmetrization of aziridines and epoxides

open access: yesBeilstein Journal of Organic Chemistry, 2013
Enantioselective desymmetrization of meso-aziridines and meso-epoxides with various nucleophiles by organocatalysis has emerged as a cutting-edge approach in recent years.
Ping-An Wang
doaj   +1 more source

4-(Benzo[d]thiazol-2-yl)-1-(2-nitrophenyl)-1H-1,2,3-triazol-5-amine

open access: yesMolbank, 2022
The protocol for the reaction of 2-nitrophenyl azide with 2-(benzo[d]thiazol-2-yl)acetonitrile has been selected. It was found that an optimal condition under which the target 4-(benzo[d]thiazol-2-yl)-1-(2-nitrophenyl)-1H-1,2,3-triazol-5-amine could be ...
Nazariy T. Pokhodylo, Mykola D. Obushak
doaj   +1 more source

(2R,4R)-2-Hydroxy-4-(2-methoxyphenyl)bicyclo[3.3.1]nonan-9-one

open access: yesActa Crystallographica Section E, 2009
The title compound, C16H20O3, contains a bicyclic ring system with two chiral centers. The crystal structure is stabilized by intermolecular O—H...O hydrogen bonds.
Shuping Luo   +4 more
doaj   +1 more source

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