ChemInform Abstract: IPSO-SUBSTITUTION IN ARYLAMINES BY A HETEROAROMATIC CATION

1978 ◽  
Vol 9 (33) ◽  
Author(s):  
O. N. CHUPAKHIN ◽  
V. N. CHARUSHIN ◽  
E. O. SIDOROV
Keyword(s):  
Ipso Substitution ◽  
Heteroaromatic Cation

ChemInform Abstract: RADICAL ALKYLDENITRATION. A SYNTHETICALLY USEFUL EXAMPLE OF HOMOLYTIC AROMATIC IPSO-SUBSTITUTION REACTIONS

1978 ◽  
Vol 9 (24) ◽  
Author(s):  
L. TESTAFERRI ◽  
M. TIECCO ◽  
M. TINGOLI ◽  
M. FIORENTINO ◽  
L. TROISI
Keyword(s):  
Substitution Reactions ◽  
Ipso Substitution

scholarly journals Catalytic Antioxidant Activity of Bis-Aniline-Derived Diselenides as GPx Mimics

Molecules ◽  
2021 ◽  
Vol 26 (15) ◽  
pp. 4446
Author(s):  
Giancarlo V. Botteselle ◽  
Welman C. Elias ◽  
Luana Bettanin ◽  
Rômulo F. S. Canto ◽  
Drielly N. O. Salin ◽  
...  
Keyword(s):  
Antioxidant Activity ◽  
Hydrogen Bond ◽  
Electronic Properties ◽  
Partial Charge ◽  
Amino Group ◽  
Diphenyl Diselenide ◽  
Charge Delocalization ◽  
Ipso Substitution ◽  
Efficient Route ◽  
Catalytic Performances

Herein, we describe a simple and efficient route to access aniline-derived diselenides and evaluate their antioxidant/GPx-mimetic properties. The diselenides were obtained in good yields via ipso-substitution/reduction from the readily available 2-nitroaromatic halides (Cl, Br, I). These diselenides present GPx-mimetic properties, showing better antioxidant activity than the standard GPx-mimetic compounds, ebselen and diphenyl diselenide. DFT analysis demonstrated that the electronic properties of the substituents determine the charge delocalization and the partial charge on selenium, which correlate with the catalytic performances. The amino group concurs in the stabilization of the selenolate intermediate through a hydrogen bond with the selenium.

scholarly journals THE REACTION BETWEEN 2,2-DIPHENYL-1-PICRYLHYDRAZYL FREE STABLE RADICAL AND N-BROMOSUCCINIMIDE

1998 ◽  
Vol 6 (7) ◽  
pp. 101-106
Author(s):  
Petre Ionita
Keyword(s):  
Nitro Group ◽  
Stable Radical ◽  
Starting Material ◽  
Secondary Product ◽  
Ipso Substitution

The reactions of 2,2-diphenyl-1-picrylhydrazyl (DPPH) or 2,2-diphenyl-1-picrylhidrazine (DPPH-H) with N-bromosuccinimide (NBS) were studied. Two main compounds Br-DPPH and (Br)2 DPPH were obtained, by bromination of the starting material in para-phenyl position, and also a secondary product, N02 DPPH. It was shown that the reactions of NBS with DPPH include a substitution at the picryl group of PPH with liberation in situ of N02 (ipso-substitution of a nitro group with bromine) and subsequently N02 is scavenged by DPPH with the foundation of N02 DPPH.

Ipso-substitution Reaction of 2- and 4-Sulfonylpyridines with Grignard Reagents

Heterocycles ◽  
1986 ◽  
Vol 24 (12) ◽  
pp. 3337 ◽  
Author(s):  
Naomichi Furukawa ◽  
Masayuki Tsuruoka ◽  
Hisashi Fujihara
Keyword(s):  
Substitution Reaction ◽  
Grignard Reagents ◽  
Ipso Substitution

Unusual transformation of 4-hydroxy/methoxybenzylic alcohols via C C ipso-substitution reaction using proton-exchanged montmorillonite as media

2020 ◽  
Vol 61 (48) ◽  
pp. 152584
Author(s):  
Xuan Chen ◽  
Yangfang Yun ◽  
Zezhong Dong ◽  
Yu Zhou ◽  
Fei Li ◽  
...  
Keyword(s):  
Substitution Reaction ◽  
Unusual Transformation ◽  
Ipso Substitution

ChemInform Abstract: Radical Isomerization via Intramolecular Ipso Substitution of Aryl Ethers: Aryl Translocation from Oxygen to Carbon.

ChemInform ◽  
2010 ◽  
Vol 24 (37) ◽  
pp. no-no
Author(s):  
E. LEE ◽  
C. LEE ◽  
J. S. TAE ◽  
H. S. WHANG ◽  
K. S. LI
Keyword(s):  
Ipso Substitution ◽  
Aryl Ethers
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