Results 11 to 20 of about 10,179 (225)

Forging Fluorine-Containing Quaternary Stereocenters by a Light-Driven Organocatalytic Aldol Desymmetrization Process [PDF]

, 2017
Reported herein is a light-triggered organocatalytic strategy for the desymmetrization of achiral 2-fluoro-substi- tuted cyclopentane-1,3-diketones.
Ametamey, Balaraman, Banik, Beeson, Borissov, Brak, Brimioulle, Brunet, Dell'Amico, Dell'Amico, Eagan, Eder, Erb, Ford, Hajos, Hamashima, Hepburn, Hintermann, Ishimaru, Jeschke, Jiang, Kalow, Kalow, Katcher, Katcher, Klán, Kwiatkowski, Lozano, Ma, Marigo, Müller, Nakamura, O'Hagan, Partridge, Prakash, Prévost, Purser, Rauniyar, Reisman, Saadi, Sammes, Steiner, Taylor, Woerly, Yang, Yang, Yang, Zeng, Zhu, Zuend   +49 more
core   +2 more sources

One-Pot Synthesis of Novel Chiral β-Amino Acid Derivatives by Enantioselective Mannich Reactions Catalyzed by Squaramide Cinchona Alkaloids

Molecules, 2013
An efficient one-pot synthesis of novel β-amino acid derivatives containing a thiadiazole moiety was developed using a chiral squaramide cinchona alkaloid as organocatalyst.
Kankan Zhang, Xueping Liang, Ming He, Jian Wu, Yuping Zhang, Wei Xue, Linhong Jin, Song Yang, Deyu Hu   +8 more
doaj   +1 more source

Organocatalyst based cross-catalytic system

Chemical Communications, 2022
Small molecule-based cross-catalytic system that operates using principles of organocatalysis.
Marieke J. Veenstra, Syuzanna R. Harutyunyan   +1 more
openaire   +3 more sources

Azidophosphonium salt-directed chemoselective synthesis of (E)/(Z)-cinnamyl-1H-triazoles and regiospecific access to bromomethylcoumarins from Morita–Baylis–Hillman adducts

Beilstein Journal of Organic Chemistry, 2020
The direct transformation of Morita–Baylis–Hillman (MBH) adducts into molecules of interest is a crucial process wherein allylic hydroxy-protected or halogenated MBH adducts are commonly preferred.
Soundararajan Karthikeyan, Radha Krishnan Shobana, Kamarajapurathu Raju Subimol, J. Helen Ratna Monica, Ayyanoth Karthik Krishna Kumar   +4 more
doaj   +1 more source

Starch nanoparticles as a bio-nanocatalyst in synthesis of diheteroaryl thioethers

Journal of Saudi Chemical Society, 2019
Nanostarch is shown to be a highly efficient, eco-friendly and heterogenous organocatalyst for the synthesis of the diheteroaryl thioethers via one-pot reaction of methylcarbonyls, thiourea and iodine in DMSO.
Homeyra Rostami Monjezi, Zohre Zarnegar, Javad Safari   +2 more
doaj   +1 more source

Heterocycle-based bifunctional organocatalysts in asymmetric synthesis [PDF]

, 2016
Different chiral bifunctional organocatalysts derived from trans-cyclohexane-1,2-diamine bearing different types of guanidine units able to form-hydrogen bonding activation have been designed. Conformational rigid 2-aminobenzimidazoles bearing a tertiary
Gómez Bengoa, Enrique, Nájera, Carmen, Sansano, Jose M.   +2 more
core   +2 more sources

Synthesis and evaluation of new guanidine-thiourea organocatalyst for the nitro-Michael reaction: Theoretical studies on mechanism and enantioselectivity

Beilstein Journal of Organic Chemistry, 2012
A new guanidine-thiourea organocatalyst has been developed and applied as bifunctional organocatalyst in the Michael addition reaction of diethyl malonate to trans-β-nitrostyrene.
Tatyana E. Shubina, Matthias Freund, Sebastian Schenker, Timothy Clark, Svetlana B. Tsogoeva   +4 more
doaj   +1 more source

Potassium phthalimide as efficient basic organocatalyst for the synthesis of 3,4-disubstituted isoxazol-5(4H)-ones in aqueous medium

Journal of Saudi Chemical Society, 2017
Potassium phthalimide (PPI) is employed as an efficient and effective basic organocatalyst for the one-pot three-component reaction of β-oxoesters with hydroxylamine hydrochloride and various aromatic aldehydes.
Hamzeh Kiyani, Fatemeh Ghorbani
doaj   +1 more source

Catalytic polymeric nanoreactors : more than a solid supported catalyst [PDF]

, 2012
Polymeric nanostructures can be synthesized where the catalytic motif is covalently attached within the core domain and protected from the environment by a polymeric shell.
Bosman, Liu, Wang, Yan
core   +2 more sources

Citrate trisulfonic acid as a novel, recyclable, and heterogeneous organocatalyst for the one-pot synthesis of 4-iminoquinolines [PDF]

Journal of Chemistry Letters, 2023
Citrate trisulfonic acid (CTSA), as a novel, heterogeneous and organocatalyst, was applied for an efficient synthesis of 4-iminoquinolines using 2-aminobenzonitrile, active methylenes and orthoesters under solvent-free conditions.
Elham Kanaani, Masoud Nasr-Esfahani, Morteza Montazerozohori   +2 more
doaj   +1 more source