Enantioselective Nucleophilic Catalysis: The Synthesis of Aza-β-Lactams through [2+2] Cycloadditions of Ketenes with Azo Compounds

2008 ◽  
Vol 120 (37) ◽  
pp. 7156-7158 ◽  
Author(s):  
Jacob M. Berlin ◽  
Gregory C. Fu
Keyword(s):  
Azo Compounds ◽  
Nucleophilic Catalysis

15N, 13C, and 1H NMR Spectra of Azo and Hydrazo Compounds Derived from 1,3,3-Trimethyl-2-methylidene-2,3-dihydroindole (Fischer Base)

1998 ◽  
Vol 63 (7) ◽  
pp. 1012-1020 ◽  
Author(s):  
Antonín Lyčka ◽  
Josef Jirman ◽  
Alois Koloničný
Keyword(s):  
Double Bond ◽  
Hydrochloric Acid ◽  
Nmr Spectra ◽  
Coupling Constants ◽  
Azo Compounds ◽  
Passive Component ◽  
Geometric Isomers ◽  
H Nmr ◽  
Fischer Base ◽  
Hydrazone Form

The 15N, 13C, and 1H NMR spectra were measured for azo and hydrazo compounds derived from 1,3,3-trimethyl-2-methylidene-2,3-dihydroindole (Fischer base), which is a passive component with a terminal methylidene group. Products prepared by coupling in hydrochloric acid exist in the corresponding hydrazone form as the E-isomers. Neutralization gives a mixture of two isomeric azo compounds which differ in the arrangement at the C(2)=C(10) double bond. This mixture was alkylated with methyl iodide to obtain the =N-N(CH3)- hydrazone derivatives. The geometric isomers were resolved based on the NOESY approach and the stereospecific behaviour of the 2J(15N,13C) coupling constants was studied for the 15N-labelled compounds.

Impact para position on rho value and rate constant and study of liquid crystalline behavior of azo compounds

2021 ◽  
Author(s):  
Mohammed Mezher Aftan ◽  
Abdualwahid Abdualsatar Talloh ◽  
Adil Hussein Dalaf ◽  
Hanaa Kaain Salih
Keyword(s):  
Rate Constant ◽  
Liquid Crystalline ◽  
Para Position ◽  
Azo Compounds

Bifunctional Au/Co3O4‐Cs (Basic and Redox)‐ Catalyzed Oxidative Synthesis of Aromatic Azo Compounds from Anilines

2021 ◽  
Author(s):  
Charles O. Oseghale ◽  
Dele Peter Fapojuwo ◽  
Oyekunle Azeez Alimi ◽  
Christianah Aarinola Akinnawo ◽  
Batsile M. Mogudi ◽  
...  
Keyword(s):  
Azo Compounds ◽  
Aromatic Azo Compounds

Fast degradation of nitro and azo compounds in recyclable noble-metal ions systems

Ionics ◽  
2019 ◽  
Vol 26 (3) ◽  
pp. 1515-1524
Author(s):  
Li Sun ◽  
Xixi Liu ◽  
Hua Zhang ◽  
Binlin Dou ◽  
Lixin Zhang ◽  
...  
Keyword(s):  
Metal Ions ◽  
Noble Metal ◽  
Azo Compounds
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