The synthesis of 5-amino-1H-pyrazole-4-carbonitriles by anomeric based oxidative aromatization over [CSPy]ZnCl3 as a new catalyst

2021 ◽  
Author(s):  
Ahmad Reza Moosavi-Zare ◽  
Mohammad Rezaei-Gohar ◽  
Mahsa Tavasoli ◽  
Hamid Goudarziafshar
Keyword(s):  
Oxidative Aromatization

The Synthesis of New Selenium-containing Heterocycles by the Oxidation Reaction of 2,4-Diaryltetrahydro-4H-selenochromenes

2020 ◽  
Vol 24 (15) ◽  
pp. 1663-1668
Author(s):  
Dmitriy Yurievich Direnko ◽  
Boris Ivanovich Drevko ◽  
Yaroslav Borisovich Drevko
Keyword(s):  
Nucleophilic Substitution ◽  
Chlorine Atom ◽  
Oxidation Reaction ◽  
Heterocyclic Fragment ◽  
Oxidative Aromatization

We have explored the reactions of tetrahydro-4H-selenochromenes in the presence of phosphoric pentachloride, and synthesized new condensate aroylbenzoselenophenes. During the reactions, tetrahydro-4H-selenochromenes with phosphoric pentachloride underwent oxidative aromatization and nucleophilic substitution for a chlorine atom of one of the protons in the alicyclic fragment. Also, the narrowing of the heterocyclic fragment occurred as in synthesized selenium-containing compounds earlier transformed into the corresponding condensate aroylbenzoselenophenes.

Thermal Non-Oxidative Aromatization of Light Alkanes Catalyzed by Gallium Nitride

2014 ◽  
Vol 53 (51) ◽  
pp. 14106-14109 ◽  
Author(s):  
Lu Li ◽  
Xiaoyue Mu ◽  
Wenbo Liu ◽  
Xianghua Kong ◽  
Shizhao Fan ◽  
...  
Keyword(s):  
Gallium Nitride ◽  
Light Alkanes ◽  
Oxidative Aromatization

Synthesis and Application of Tetrafluoroethylene (CF2CF2)-Containing Acetylene Derivatives

Synthesis ◽  
2020 ◽  
Vol 52 (13) ◽  
pp. 1947-1958
Author(s):  
Tsutomu Konno ◽  
Gen Egashira ◽  
Chihiro Kajimoto ◽  
Takuto Kataoka ◽  
Shigeyuki Yamada
Keyword(s):  
Coupling Reaction ◽  
Cross Coupling ◽  
Alder Reaction ◽  
Diels Alder ◽  
Benzene Derivatives ◽  
Diels Alder Reaction ◽  
Cross Coupling Reaction ◽  
Oxidative Aromatization ◽  
High Yields ◽  
Acetylene Derivatives

On treating 1,3,4-tribromo-1,1,2,2-tetrafluorobutane, readily prepared from commercially available 4-bromo-3,3,4,4-tetrafluorobut-1-ene, with 3.3 equivalents of LHMDS at 0 °C in THF, the corresponding lithium acetylide could be prepared quantitatively. The acetylide reacted well with various aldehydes, ketones, or chlorosilanes to give the corresponding acetylene derivatives in high yields. It was also found that various iodoarenes could participate in the cross-coupling reaction with the zinc acetylide, readily prepared from the lithium acetylide and ZnCl2·TMEDA complex, in the presence of Pd(PPh3)4 to bring about the adducts in high yields. Thus-obtained acetylene derivatives underwent smooth Diels–Alder reaction with various 1,3-dienes to afford the corresponding 1,4- or 1,3-cyclohexadiene derivatives. In addition, it was revealed that the oxidative aromatization of the resulting cyclohexadiene derivatives with DDQ took place very smoothly, providing the multi-substituted benzene derivatives having a tetrafluoro­ethylene group.

Oxidative Aromatization of Hantzsch 1,4-Dihydropyridines by SiO2/P2O5—SeO2 under Mild and Heterogeneous Conditions.

ChemInform ◽  
2007 ◽  
Vol 38 (28) ◽  
Author(s):  
Satya Paul ◽  
Shivani Sharma ◽  
Monika Gupta ◽  
Deepak Choudhary ◽  
Rajive Gupta
Keyword(s):  
Oxidative Aromatization

Inter- and Intramolecular Alkyne–Carbonyl Metathesis/1,6-Addition/Oxidative Aromatization Tandem Reactions between 1,6-Diynes and Aldehydes

2019 ◽  
Vol 21 (21) ◽  
pp. 8847-8851 ◽  
Author(s):  
Noriko Okamoto ◽  
Takuya Sueda ◽  
Hideki Minami ◽  
Reiko Yanada
Keyword(s):  
Tandem Reactions ◽  
Oxidative Aromatization
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