Results 61 to 70 of about 10,179 (225)

Asymmetric organocatalysis of the addition of acetone to 2-nitrostyrene using N-diphenylphosphinyl-1,2-diphenylethane-1,2-diamine (PODPEN) [PDF]

, 2010
The highly enantioselective addition of acetone to 2-nitrostyrene, using N–diphenylphosphinyl-trans-1,2-diphenylethane-1,2-diamine (PODPEN) as catalyst, is ...
A. Simon Partridge, Bernardi, Burns, Charles V. Manville, Chaun, Connon, Dahlin, Daugidas T. Racys, David J. Morris, Denmark, Eder, Fletcher, García-García, Gary Woodward, Gordon Docherty, Hayashi, Hine, Hine, Huang, Ju, Kohmura, Laars, Lattanzi, Li, Liu, Liu, Martin Wills, Massi, Mei, Melchiorre, Ni, Ni, Pansare, Rishel, Seayad, Sulzer-Mosse, Suzuki, Tan, Tan, Tan, Tsandi, Tsogeova, Vijaikumar, Wang, Wang, Wang, Watson, Xu, Xu, Xu, Xu, Xue, Yu, Zhang   +53 more
core   +1 more source

Enantioselective Michael addition of isobutyraldehyde to nitroalkenes organocatalyzed by chiral primary amine-guanidines [PDF]

, 2014
Primary amine-guanidines derived from trans-cyclohexane-1,2-diamines are used as organocatalysts for the enantioselective conjugate addition of isobutyraldehyde to arylated and heteroarylated nitroalkenes.
Chinchilla, Rafael, Fiser, Béla, Gómez Bengoa, Enrique, Nájera, Carmen, Ávila Freire, Ángel   +4 more
core   +2 more sources

Conformational Analysis and Organocatalytic Activity of Helical Stapled Peptides Containing α-Carbocyclic α,α-Disubstituted α-Amino Acids

Molecules
Conformational freedom-restricted peptides, such as stapled peptides, play a crucial role in the advancement of functional peptide development. We synthesized stapled octapeptides using α-carbocyclic α,α-disubstituted α-amino acids, particularly 3 ...
Akihiro Iyoshi, Atsushi Ueda, Tomohiro Umeno, Takuma Kato, Kazuhiro Hirayama, Mitsunobu Doi, Masakazu Tanaka   +6 more
doaj   +1 more source

2-(5-phenyl-4H-1,2,4-triazol-3-ylthio)acetic acid: Greener and efficient organocatalyst for multicomponent reactions under aqueous media

Current Research in Green and Sustainable Chemistry, 2021
A simple, ecofriendly and competent method is reported for the synthesis of functionalized amines via reductive amination of carbonyl compounds with amines and β-amino ketones via Mannich reaction, using greener and efficient organocatalyst, 2-(5-phenyl ...
Harsha Sharma, Sunny Sharma, Satya Paul
doaj   +1 more source

Novel octapeptide as an asymmetric catalyst for Michael reaction in aqueous media [PDF]

, 2013
In this work, three forms of a novel octapeptide have been evaluated as asymmetric catalysts for the Michael reaction. Low quantity catalyst loading, ecofriendly solvents, and reusability of organocatalyst successfully applied to attain excellent yields ...
Abd. Malek, Emilia, Abdul Rahman, Mohd Basyaruddin, Bayat, Saadi, Mohd Yahaya, Normi, Salleh, Abu Bakar, Tejo, Bimo Ario   +5 more
core   +1 more source

MOFs as New Catalytic Platform for Covalent Adaptable Networks: Catalysis Meets Reinforcement

Angewandte Chemie International Edition, EarlyView.
A novel heterogeneous catalytic platform for covalent adaptable networks (CANs) is introduced by immobilizing bases of low molecular weight on metal‐organic frameworks (MOFs). The obtained catalyst UiO‐TBD benefits from the high loading capacity of the MOF and demonstrates a higher thermal stability relative to free TBD.
Simon Renner, Roman Korotkov, Inge Mühlbacher, Markus Alfreider, Daniel Kiener, Johannes Liebhart, Oskar Paris, Christian Slugovc, Sandra Schlögl, Elisabeth Rossegger   +9 more
wiley   +1 more source

Asymmetric Synthesis of Tertiary α -Hydroxyketones by Enantioselective Decarboxylative Chlorination and Subsequent Nucleophilic Substitution

Molecules, 2020
Chiral tertiary α-hydroxyketones were synthesized with high enantiopurity by asymmetric decarboxylative chlorination and subsequent nucleophilic substitution.
Mei Kee Kam, Akira Sugiyama, Ryouta Kawanishi, Kazutaka Shibatomi   +3 more
doaj   +1 more source

Solvent-Free Enantioselective Organocatalyzed Aldol Reactions [PDF]

, 2014
The use of proline as catalyst for the aldol process has given a boost to the development of organocatalysis as a research area. Since then, a plethora of organocatalysts of diverse structures have been developed for this and other organic ...
Bañón Caballero, Abraham, Guillena, Gabriela, Nájera, Carmen   +2 more
core   +2 more sources

Metal‐Free Covalent Organic Frameworks for Photocatalytic CO2 Reduction

ChemistryEurope, EarlyView.
This review presents an environmentally sustainable strategy to address the critical issue of escalating atmospheric CO2 levels. It explores the application of metal‐free covalent organic frameworks in a photocatalytic approach, offering a green and efficient strategy for carbon dioxide reduction and contributing to climate change mitigation.
Supriti Dutta, Akhtar Alam, Pekham Chakrabortty, Pradip Pachfule   +3 more
wiley   +1 more source

Organocatalyzed Asymmetric α-Oxidation, α-Aminoxylation and α-Amination of Carbonyl Compounds

Molecules, 2010
Organocatalytic asymmetric α-oxidation and amination reactions of carbonyl compounds are highly useful synthetic methodologies, especially in generating chiral building blocks that previously have not been easily accessible by traditional methods.
Worawan Bhanthumnavin, Tirayut Vilaivan
doaj   +1 more source