ChemInform Abstract: Thiazolylmethylenetriphenylphosporane and Its Benzo Derivative: Stable and Practical Wittig Reagents for the Synthesis of Vinylthiazoles and Vinylbenzothiazoles. Two-Carbon Homologation of Aldehydes.

ChemInform ◽  
1988 ◽  
Vol 19 (31) ◽  
Author(s):  
A. DONDONI ◽  
G. FANTIN ◽  
M. FOGAGNOLO ◽  
A. MEDICI ◽  
P. PEDRINI
Keyword(s):  
Benzo Derivative

Copper macrocyclic complex with trans-di[benzo]-porphyrazine and two oxo ligands: DFT quantum-chemical design

2021 ◽  
pp. A-F
Author(s):  
Oleg V. Mikhailov ◽  
Denis V. Chachkov
Keyword(s):  
Quantum Chemical ◽  
Structural Parameters ◽  
Dft Method ◽  
Nbo Analysis ◽  
Macrocyclic Complex ◽  
Chemical Calculation ◽  
Entropy Formula ◽  
Energy Formula ◽  
Thermodynamic Parameters Of Formation ◽  
Benzo Derivative

Based on the results of a quantum chemical calculation using the DFT method in the OPBE/TZVP and B3PW91/TZVP, the possibility of the existence of a copper heteroligand complex with trans-di[benzo]derivative of 3,7,11,15-tetraazaporphine (trans-di[benzo]porphyrazine) and two oxygen (O[Formula: see text] ions that is still unknown for this element was shown. In addition, the data on the structural parameters, the multiplicity of the ground state, NBO analysis and standard thermodynamic parameters of formation (standard enthalpy [Formula: see text], entropy [Formula: see text] and Gibbs’s energy [Formula: see text] for this complex are presented.

A bromide ion-selective polymeric membrane electrode based on a benzo-derivative xanthenium bromide salt

2000 ◽  
Vol 418 (2) ◽  
pp. 197-203 ◽  
Author(s):  
Mojtaba Shamsipur ◽  
Shohreh Rouhani ◽  
Ali Mohajeri ◽  
Mohammad Reza Ganjali ◽  
Parviz Rashidi-Ranjbar
Keyword(s):  
Polymeric Membrane ◽  
Membrane Electrode ◽  
Bromide Ion ◽  
Polymeric Membrane Electrode ◽  
Benzo Derivative

Struktur und Magnetismus stabiler Radikalkation-Salze: Ν,N′-Diethylchinoxalinium Tetraphenylborat im Vergleich mit Pyrazinium- und Phenazinium-Analogen / Structure and Magnetism of Stable Cation Radical Salts: N,N′-Diethylquinoxalinium Tetraphenylborate as Compared with Pyrazinium and Phenazinium Analogues

1989 ◽  
Vol 44 (10) ◽  
pp. 1233-1238 ◽  
Author(s):  
H.-D. Hausen ◽  
Wolfgang Kaim ◽  
Andreas Schulz ◽  
Eberhard Roth
Keyword(s):  
Molecular Structure ◽  
Solid State ◽  
Structure Analysis ◽  
Crystal And Molecular Structure ◽  
Cation Radical ◽  
Structural Features ◽  
Alkyl Groups ◽  
Molecular Structure Analysis ◽  
Benzo Derivative ◽  
Quinoxaline Ring

Crystal and molecular structure analysis of N,N′-diethylquinoxalinium tetraphenylborate shows a virtually planar quinoxaline ring with 11 conjugated π electrons and approximately antiperiplanar ethyl groups. In comparison with the benzo-analogous phenazinium systems and the de-benzo derivative N,N′-diethylpyrazinium cation, the quinoxalinium species adopts an intermediate position in terms of intra- and intermolecular structural features. In particular, increasing benzanellation seems to favour a cation/anion approach for electrostatic reasons whereas the N—C bonds to the hyperconjugatively charge delocalizing alkyl groups increase due to peri interactions. Solid state magnetic and ESR measurements are compatible with the crystallographically determined structure.

scholarly journals ESR Spectra of Anion Radicals of 8,8-Dicyanoheptafulvene and Its 4,5-Benzo Derivative

1982 ◽  
Vol 55 (3) ◽  
pp. 651-653 ◽  
Author(s):  
Yusaku Ikegami ◽  
Takashi Muramatsu ◽  
Toyonobu Asao
Keyword(s):  
Esr Spectra ◽  
Benzo Derivative ◽  
Anion Radicals

Synthesis and metalation of some phenalenothiophenes and a fused benzo derivative

1971 ◽  
Vol 36 (18) ◽  
pp. 2683-2689 ◽  
Author(s):  
D. W. H. MacDowell ◽  
R. A. Jourdenais ◽  
R. Naylor ◽  
G. E. Paulovicks
Keyword(s):  
Benzo Derivative

78. 4-Pyrones. Part V. Some reactions of flavanone and its 5,6-benzo-derivative

1965 ◽  
pp. 494 ◽  
Author(s):  
Mohamed A.-F. Elkascheff ◽  
Michael H. Nosseir ◽  
Hossam-El-Din M. Mohamed
Keyword(s):  
Benzo Derivative

5-Aminofuro[3,2-c]pyridinium Tosylates and Substituted Furo[3,2-c]pyridine N-Oxides: Synthesis and Reactions

1999 ◽  
Vol 64 (3) ◽  
pp. 539-547 ◽  
Author(s):  
Mária Bencková ◽  
Alžbeta Krutošíková
Keyword(s):  
Carboxylic Acid ◽  
Potassium Carbonate ◽  
Alkaline Hydrolysis ◽  
Anhydrous Potassium Carbonate ◽  
Benzoyl Chloride ◽  
Cyano Group ◽  
Dipolar Cycloaddition ◽  
Cycloaddition Reactions ◽  
Cyanide Anion ◽  
Benzo Derivative

5-Aminofuro[3,2-c]pyridinium tosylates 2a-2c were synthesized by direct N-amination of furo[3,2-c]pyridines 1a-1c with O-(4-methylbenzenesulfonyl)hydroxylamine in dichloromethane. Zwitterionic furo[3,2-c]pyridinium N-imides 3a-3c generated from 2a-2c and anhydrous potassium carbonate in N,N-dimethylformamide afforded by 1,3-dipolar cycloaddition reactions with dimethyl butynedioate or ethyl propiolate the corresponding furo[3,2-c]pyrazolo[1,5-a]pyridinecarboxylic esters 4a-4c and 5a-5c. Furo[3,2-c]pyridine N-oxides 6a-6c and their benzo derivative 6d were synthesized by reaction of 1 with 3-chloroperbenzoic acid in dichloromethane. Treatment of N-oxides 6 with benzoyl chloride and cyanide anion (Reissert-Henze reaction) was shown to produce the corresponding furo[3,2-c]pyridine-4-carbonitriles 7. In further transformations (acid and alkaline hydrolysis), the cyano group was converted successively to amide and carboxylic acid.

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