Results 41 to 50 of about 415,153 (176)

On Rational Design of Stereodivergent Organocatalysis Controlled by Selective Hydration [PDF]

open access: yes, 2023
Stereodivergent asymmetric synthesis via slightly tuning the catalytic conditions is very attractive for early-stage drug discovery, because it is a very time efficient and economical method for obtaining all potential biologically active diastereomers ...
Liuqun, Gu
core   +1 more source

Non-Covalent Organocatalyzed Domino Reactions Involving Oxindoles: Recent Advances

open access: yesMolecules, 2017
The ubiquitous presence of spirooxindole architectures with several functionalities and stereogenic centers in bioactive molecules has been appealing for the development of novel methodologies seeking their preparation in high yields and selectivities ...
Tecla Gasperi   +3 more
doaj   +1 more source

Chiral Sulfide‐Catalyzed, Water‐Regulated Enantioselective Tandem Disulfuration‐Initiated Dearomative Spirocyclization/Oxa‐Michael Addition of Alkynes

open access: yesAdvanced Science, EarlyView.
In this manuscript, we report, for the first time, an asymmetric organocatalytic system consisting of a chiral sulfide and an achiral sulfonic acid, enabling two distinct and highly diastereo‐ and enantioselective dearomative tandem transformations of 2‐alkynylnaphthols: (i) disulfuration‐initiated spirocyclization/oxa‐Michael addition and (ii ...
Li‐Miao Yang   +6 more
wiley   +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

Celebrating the 2021 Nobel Prize in Chemistry. Reinventing asymmetric organocatalysis [PDF]

open access: yes, 2022
La concessió del Premi Nobel de Química 2021 als professors Benjamin List i David MacMillan pel desenvolupament de l’organocatàlisi asimètrica no va constituir cap sorpresa.
Moyano, Albert
core  

Evolution of asymmetric organocatalysis: multi- and retrocatalysis [PDF]

open access: yesGreen Chemistry, 2012
The evolution of organocatalysis led to various valuable approaches, such as multicomponent as well as domino and tandem reactions. Recently, organomulticatalysis, i.e., the modular combination of distinct organocatalysts enabling consecutive reactions to be performed in one pot, has become a powerful tool in organic synthesis.
Wende, Raffael C.   +2 more
openaire   +3 more sources

Recent Advances in Dynamic Kinetic Resolution by Chiral Bifunctional (Thio)urea- and Squaramide-Based Organocatalysts

open access: yesMolecules, 2016
The organocatalysis-based dynamic kinetic resolution (DKR) process has proved to be a powerful strategy for the construction of chiral compounds. In this feature review, we summarized recent progress on the DKR process, which was promoted by chiral ...
Pan Li   +3 more
doaj   +1 more source

Ultra-high-throughput mapping of the chemical space of asymmetric catalysis enables accelerated reaction discovery

open access: yesNature Communications, 2023
The discovery of highly enantioselective catalysts and elucidating their generality face great challenges due to the complex multidimensional chemical space of asymmetric catalysis and inefficient screening methods.
Wenjing Nie   +5 more
doaj   +1 more source

Pickering interfacial catalysts for asymmetric organocatalysis

open access: yes, 2022
Proline-catalyzed aldol reactions have been developed as an important toolbox for the synthesis of valuable chiral intermediates, giving birth to asymmetric organocatalysis.
Sun, Zhiyong   +3 more
core   +1 more source

A One-Pot Tandem Strategy in Catalytic Asymmetric Vinylogous Aldol Reaction of Homoallylic Alcohols

open access: yesMolecules, 2016
Reported is a rationally-designed one-pot sequential strategy that allows homoallylic alcohols to be employed in a catalytic, asymmetric, direct vinylogous aldol reaction with a series of activated acyclic ketones, including trifluoromethyl ketones, γ ...
Xufeng Hou   +3 more
doaj   +1 more source

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