Results 11 to 20 of about 58,285 (293)

The tert-Amino Effect in Heterocyclic Chemistry. Synthesis of Spiro Heterocycles [PDF]

Molecules, 2005
The tert-amino reaction effect was examined. A new method to synthesize spiro heterocycles is presented. It was shown that the “tert-amino effect” could be applied to the formation of spiro-fused heterocycles.
Y. Morzherin, O. Eltsov, L. Dyudya, T. Glukhareva, E. D’yachenko   +4 more
doaj   +4 more sources

Heterocyclic Electrochemistry: Renewable Electricity in the Construction of Heterocycles

ACS Omega, 2023
Numerous applications in the realm of biological exploration and drug synthesis can be found in heterocyclic chemistry, which is a vast subject. Many efforts have been developed to further improve the reaction conditions to access this interesting family to prevent employing hazardous ingredients.
Samina Aslam, Najoua Sbei, Sadia Rani, Manal Saad, Aroog Fatima, Nisar Ahmed   +5 more
openaire   +4 more sources

The Domino Way to Heterocycles [PDF]

ChemInform, 2007
AbstractChemInform is a weekly Abstracting Service, delivering concise information at a glance that was extracted from about 200 leading journals. To access a ChemInform Abstract, please click on HTML or PDF.
Albert, Padwa, Scott K, Bur
openaire   +2 more sources

Microwave Assisted Synthesis of Indole Substituted Alkenes Using Knoevenagel Condensation Reaction and their Antibacterial Activity Study

E-Journal of Chemistry, 2010
The reaction rate of Knoevenagel condensation can be dramatically enhanced by irradiating the reaction mixture containing an aldehyde, active methylene compound, L-proline and chlorobenzene with a commercial microwave oven.
Shubha Jain, B. Nagi Reddy, K. Sambasiva Rao, G. Neeliah   +3 more
doaj   +1 more source

Azides in the Synthesis of Various Heterocycles

Molecules, 2022
In this review, we focus on some interesting and recent examples of various applications of organic azides such as their intermolecular or intramolecular, under thermal, catalyzed, or noncatalyzed reaction conditions.
AbdElAziz A. Nayl, Ashraf A. Aly, Wael A. A. Arafa, Ismail M. Ahmed, Ahmed I. Abd-Elhamid, Esmail M. El-Fakharany, Mohamed A. Abdelgawad, Hendawy N. Tawfeek, Stefan Bräse   +8 more
doaj   +1 more source

Heterocycles Synthesis at Carbonylation of Acetylenic Compounds

Eurasian Chemico-Technological Journal, 2003
The carbonylation of unsaturated hydrocarbons, alcohols, organic halides and other substrates catalyzed by transition metals, salts of transition metals and organometallic complexes is a wide used synthesis method of new carbonyl, carboxyl and alkoxy ...
S.A. Vizer, K.B. Yerzhanov
doaj   +1 more source

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

Dibenzonaphthyridinones: Heterocycle-to-Heterocycle Synthetic Strategies and Photophysical Studies [PDF]

Organic Letters, 2015
A heterocycle-to-heterocycle strategy is presented for the preparation of highly fluorescent and solvatochromic dibenzonaphthyridinones (DBNs) via methodology that leads to the formation of a tertiary, spiro-fused carbon center. A linear correlation between the results of photophysical experiments and time dependent density functional theory ...
Palazzo, Teresa A, Patra, Digambara, Yang, Joung S, Khoury, Elsy El, Appleton, Mackenzie G, Haddadin, Makhluf J, Tantillo, Dean J, Kurth, Mark J   +7 more
openaire   +4 more sources

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