Benzylidenemalonaldehydes: A redox reaction during the attempted cycloaddition on nitrosobenzene

1985 ◽  
Vol 50 (10) ◽  
pp. 2260-2264 ◽  
Author(s):  
Dalimil Dvořák ◽  
Miloš Buděšínský ◽  
David Šaman ◽  
Zdeněk Arnold
Keyword(s):  
Methyl Ester ◽  
Hydrogen Bonds ◽  
Acrylic Acid ◽  
Redox Reaction ◽  
Nmr Spectra ◽  
Oxidation Process ◽  
Intramolecular Hydrogen Bonds ◽  
Intramolecular Hydrogen ◽  
C Nmr

Reaction of p-chlorobenzylidenemalonaldehyde with nitrosobenzene represents a reduction-oxidation process leading to 2-formyl-3-anilino-3-(4-chlorophenyl)acrylic acid (III). The structure of the product, including two intramolecular hydrogen bonds, has been proved by analysis of the 1H and 13C NMR spectra of the acid III, its deuterated form and the methyl ester obtained by reaction with diazomethane.

A study of the conformational states of cyclopeptide systems IV. NMR spectra of cyclohexapeptides constructed of alanine and glycine residues: Chemical shifts and intramolecular hydrogen bonds

1971 ◽  
Vol 7 (3) ◽  
pp. 307-318 ◽  
Author(s):  
S. L. Portnova ◽  
T. A. Balashova ◽  
V. F. Bystrov ◽  
V. V. Shilin ◽  
Ya. Bernat ◽  
...  
Keyword(s):  
Hydrogen Bonds ◽  
Nmr Spectra ◽  
Chemical Shifts ◽  
Conformational States ◽  
Intramolecular Hydrogen Bonds ◽  
Intramolecular Hydrogen

Controlling emissive properties by intramolecular hydrogen bonds: alkyl and aryl meso‐substituted porphycenes

2021 ◽  
Author(s):  
Jacek Waluk ◽  
Arkadiusz Listkowski ◽  
Natalia Masiera ◽  
Michał Kijak ◽  
Roman Luboradzki ◽  
...  
Keyword(s):  
Hydrogen Bonds ◽  
Intramolecular Hydrogen Bonds ◽  
Intramolecular Hydrogen

Energies of intramolecular hydrogen bonds in some alcohols

1974 ◽  
Vol 20 (3) ◽  
pp. 414-415
Author(s):  
Ya. A. Shuster ◽  
V. A. Granzhan ◽  
P. M. Zaitsev
Keyword(s):  
Hydrogen Bonds ◽  
Intramolecular Hydrogen Bonds ◽  
Intramolecular Hydrogen

Hydrogen bonds in derivatives of N-substituted N’-benzoyl- and N’-(2-chlorobenzoyl)thiourea

1991 ◽  
Vol 56 (4) ◽  
pp. 880-885 ◽  
Author(s):  
Oľga Hritzová ◽  
Dušan Koščík
Keyword(s):  
Hydrogen Bonds ◽  
Spectral Studies ◽  
Intramolecular Hydrogen Bonds ◽  
Tautomeric Forms ◽  
Intramolecular Hydrogen ◽  
Derivatives Of

Intramolecular hydrogen bonds of the N-H···O=C type have been detected in the derivatives of N-substituted N’-benzoyl- and N’-(2-chlorobenzoyl)thiourea on the basis of IR spectral studies. The title compounds can exist in two tautomeric forms.

Spin-spin coupling via intramolecular hydrogen bonds

1985 ◽  
Vol 25 (5) ◽  
pp. 808-810
Author(s):  
L. N. Kurkovskaya ◽  
Yu. M. Chunaev ◽  
N. M. Przhiyalgovskaya
Keyword(s):  
Hydrogen Bonds ◽  
Spin Coupling ◽  
Intramolecular Hydrogen Bonds ◽  
Intramolecular Hydrogen ◽  
Spin Spin Coupling

Synthesis of α-Dawson-Type Silicotungstate [α-Si2W18O62]8−and Protonation and Deprotonation Inside the Aperture through Intramolecular Hydrogen Bonds

2014 ◽  
Vol 20 (20) ◽  
pp. 5946-5952 ◽  
Author(s):  
Takuo Minato ◽  
Kosuke Suzuki ◽  
Keigo Kamata ◽  
Noritaka Mizuno
Keyword(s):  
Hydrogen Bonds ◽  
Intramolecular Hydrogen Bonds ◽  
Intramolecular Hydrogen

3,3′-N,N′-Bis(amino)-2,2′-bipyridine — An unusually methylation-resistant amine

2011 ◽  
Vol 89 (8) ◽  
pp. 971-977
Author(s):  
Danielle M. Chisholm ◽  
Robert McDonald ◽  
J. Scott McIndoe
Keyword(s):  
Crystal Structure ◽  
Hydrogen Bonds ◽  
Complex Mixtures ◽  
Amino Groups ◽  
Intramolecular Hydrogen Bonds ◽  
X Ray ◽  
Intramolecular Hydrogen

Methylation of aromatic amino groups is usually straightforward, but the formation of two intramolecular hydrogen bonds in 3,3′-N,N′-bis(amino)-2,2′-bipyridine and (or) the potential for ring methylation prevents the clean tetramethylation of this molecule. Numerous attempts to make 3,3′-N,N′-bis(dimethylamino)-2,2′-bipyridine produced only complex mixtures of variously methylated products, and the only isolated molecule was 3,3′-N,N′-bis(methylamino)-2,2′-bipyridine, for which an X-ray crystal structure was obtained.

Influence of intramolecular hydrogen bonds in the enzyme-catalyzed regioselective acylation of quinic and shikimic acid derivatives

Tetrahedron ◽  
2006 ◽  
Vol 62 (23) ◽  
pp. 5401-5410 ◽  
Author(s):  
Nuria Armesto ◽  
Susana Fernández ◽  
Miguel Ferrero ◽  
Vicente Gotor
Keyword(s):  
Hydrogen Bonds ◽  
Shikimic Acid ◽  
Regioselective Acylation ◽  
Intramolecular Hydrogen Bonds ◽  
Intramolecular Hydrogen
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