Results 21 to 30 of about 6,365 (202)

A hidden catalysis: metal-, and organocatalyst-free one-pot assembly of chiral aza-tricyclic molecules [PDF]

open access: yes, 2021
Development of a rapid synthesis of complex molecules from simple building blocks under a metal-and organocatalyst-free condition is both conceptually and chemically challenging.
Dung, Do
core   +2 more sources

Recent advances and prospects in the organocatalytic synthesis of quinazolinones

open access: yesFrontiers in Chemistry, 2022
Quinazolinone, a bicyclic compound, comprises a pyrimidine ring fused at 4´ and 8´ positions with a benzene ring and constitutes a substantial class of nitrogen-containing heterocyclic compounds on account of their frequent existence in the key fragments
Biplob Borah   +3 more
doaj   +1 more source

Synthesis and alcohol catalytic properties of TEMPO functionalized Zr-based MOFs

open access: yesCailiao gongcheng, 2020
A strategy based on grafting organocatalytic units as side-chain on the organic linkers, a TEMPO radical decorated terphenyl-dicarboxylic acid linker was synthesized.
ZHUANG Jin-liang, LIU Xiang-yue, DU Xuan
doaj   +1 more source

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

open access: yesMolecules, 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   +8 more
doaj   +1 more source

Enantioselective Organocatalyzed Michael Addition of Isobutyraldehyde to Maleimides in Aqueous Media

open access: yesMolecules, 2022
Thiourea was introduced into (R,R)-1,2-diphenylethylenediamine as an organocatalyst to promote the reaction between isobutyraldehydes and maleimides. Enantioselective Michael addition reaction was carried out as an eco-friendly method using water as the ...
Jae Ho Shim   +3 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

open access: yesJournal 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

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

open access: yesBeilstein 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   +4 more
doaj   +1 more source

Pyrrolidine-oxadiazolone conjugate as new organocatalyst for asymmetric aldol condensation

open access: yes, 2023
A proline-based, chiral bi-functional organocatalyst containing both pyrrolidine and oxadiazolone heterocycle, has been successfully applied for stereoselective aldol reactions.
Chandan K. Mahato (6171422)   +3 more
core   +1 more source

Carbapenems as water soluble organocatalysts [PDF]

open access: yesWellcome Open Research, 2018
Background: Identification of organocatalysts functioning in aqueous environments will provide methods for more sustainable chemical transformations and allow tandem reactions with biocatalysts, like enzymes.
Thomas L. Williams   +3 more
openaire   +2 more sources

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

open access: yesJournal 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   +2 more
doaj   +1 more source

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