Results 21 to 30 of about 101,033 (289)

An electrochemical gram-scale protocol for pyridylation of inert N-heterocycles with cyanopyridines

STAR Protocols, 2022
Summary: Here, we present a protocol to decyanopyridate inert N-heterocycles access to N-fused heterocycles via the mechanism of dual proton-coupled electron transfer (PCET).
Cong Niu, Jianjing Yang, Kelu Yan, Jiafang Xie, Wei Jiang, Bingwen Li, Jiangwei Wen   +6 more
doaj   +1 more source

Heterocycles from cyclopropenones

RSC Advances, 2022
Great attention has been paid to cyclopropenones as they are present in many natural sources.
Ashraf A. Aly, Alaa A. Hassan, Sara M. Mostafa, Asmaa. H. Mohamed, Esraa M. Osman, AbdElAziz A. Nayl   +5 more
openaire   +2 more sources

Predicting Solid-State Heats of Formation of Newly Synthesized Polynitrogen Materials by Using Quantum Mechanical Calculations [PDF]

, 2008
We present density functional theory level predictions and analysis of the basic properties of newly synthesized high-nitrogen compounds together with 3,6-bis(2H-tetrazol-5-yl)-1,2,4,5-tetrazine (BTT) and 3,3′-azobis(6-amino-1,2,4,5-tetrazine) (DAAT ...
Abou-Rachid, H., Dudiy, S., Goddard, W. A., III, Hu, A., Song, Y., Zybin, S. V.   +5 more
core   +1 more source

Phosphorus-Sulfur Heterocycles Incorporating an O-P(S)-O or O-P(S)-S-S-P(S)-O Scaffold: One-Pot Synthesis and Crystal Structure Study

Molecules, 2017
A new one-pot preparative route was developed to synthesize novel organophosphorus-sulfur heterocycles via the reaction of the four-membered ring thionation reagent [2,4-diferrocenyl-1,3,2,4-diathiadiphosphetane 2,4-disulfide (FcLR, a ferrocene analogue ...
Guoxiong Hua, Kate Davidson, David B. Cordes, Junyi Du, Alexandra M. Z. Slawin, J. Derek Woollins   +5 more
doaj   +1 more source

Enantioselective construction of six- and seven-membered triorgano-substituted silicon-stereogenic heterocycles

Nature Communications, 2021
Enantioenriched medium-sized silicon-stereogenic heterocycles are in high demand due to the potential use in functional materials. Here, the authors show a rhodium-catalyzed enantioselective synthesis of six- and seven-membered tri-organosubstituted ...
Shuyou Chen, Delong Mu, Pei-Lin Mai, Jie Ke, Yingzi Li, Chuan He   +5 more
doaj   +1 more source

Palladium-catalyzed acetylation of arenes. [PDF]

, 2014
A simple method for the preparation of aryl methyl ketones is reported. The transformation involves the Pd-catalyzed coupling of an acyl anion equivalent, acetyltrimethylsilane, with aryl bromides to afford the corresponding acetylated arenes in ...
Garg, Neil K, Ramgren, Stephen D
core   +1 more source

A Brief Review on the Synthesis of the N-CF₃ Motif in Heterocycles

Molecules, 2023
The trifluoromethyl group is widely recognized for its significant role in the fields of medicinal chemistry and material science due to its unique electronic and steric properties that can alter various physiochemical properties of the parent molecule ...
Zizhen Lei, Wenxu Chang, Hong Guo, Jiyao Feng, Zhenhua Zhang   +4 more
doaj   +1 more source

Hydrazones as Singular Reagents in Asymmetric Organocatalysis [PDF]

, 2016
This Minireview summarizes strategies and developments regarding the use of hydrazones as reagents in asymmetric organocatalysis, their distinct roles in nucleophile–electrophile, cycloaddition, and cyclization reactions.
Fernández Fernández, Rosario Fátima, Lassaletta, José M., Matador Martínez, Esteban, Monge Fernández, David, Retamosa Hernández, María Gracia   +4 more
core   +1 more source

In silico screening of drug-like molecules for the treatment of cardiovascular diseases on the basis of five-membered privileged heterocycles

Фармацевтичний журнал, 2019
Among various heterocyclic systems, the derivatives of five-membered heterocycles are of special interest. Most of the above mentioned heterocycles are treatred as so-called privileged structures in modern medicinal chemistry.
І. V. Drapak
doaj   +1 more source

Direct C–H difluoromethylation of heterocycles via organic photoredox catalysis

Nature Communications, 2020
Heterocycles containing difluoromethyl groups are molecules with potential application in pharmaceutical, agricultural and materials science. Here, the authors show an organophotocatalytic difluoromethylation of heterocycles using O2 as green oxidant and
Wei Zhang, Xin-Xin Xiang, Junyi Chen, Chen Yang, Yu-Liang Pan, Jin-Pei Cheng, Qingbin Meng, Xin Li   +7 more
doaj   +1 more source