67. The magnetic susceptibility of certain organic compounds. Part III. The contribution of the nitro-group to the magnetic susceptibility of aliphatic and aromatic nitro-compounds

1950 ◽  
pp. 308 ◽  
Author(s):  
F. G. Baddar ◽  
S. Sugden
Keyword(s):  
Magnetic Susceptibility ◽  
Nitro Group ◽  
Organic Compounds ◽  
Nitro Compounds ◽  
Aromatic Nitro Compounds ◽  
Aromatic Nitro

Simple Synthesis of Dimethyl Nitrobenzhydrylphosphonates and Heteroarylnitroarylacetonitriles via Vicarious Nucleophilic Substitution (VNS) Reaction

Synthesis ◽  
2020 ◽  
Vol 53 (01) ◽  
pp. 175-181
Author(s):  
Mieczysław Mąkosza ◽  
Małgorzata Bechcicka ◽  
Krzysztof Wojciechowski
Keyword(s):  
Nucleophilic Substitution ◽  
Nitro Group ◽  
Nitro Compounds ◽  
Simple Synthesis ◽  
Para Position ◽  
Crucial Step ◽  
Vicarious Nucleophilic Substitution ◽  
Aromatic Nitro Compounds ◽  
Leaving Group ◽  
Aromatic Nitro

Acetals of dimethyl phenyl- and heteroaryl-α-hydroxymethanephosphonates were deprotonated to generate carbanions, which enter the vicarious nucleophilic substitution (VNS) of hydrogen in aromatic nitro compounds to form 4-nitrobenzhydrylphosphonates and α-heteroaryl-4-nitrobenzylphosphonates. Similarly acetals of cyano­hydrins of heteroaromatic aldehydes (furfural and 2-formylthiophene) react to form heteroaryl 4-nitroarylacetonitriles. The anion of the hemiacetal of acetaldehyde is an efficient leaving group in the base-induced β-elimination step – the crucial step in the VNS reaction. The reaction selectively occurred at the para-position to the nitro group.

A solvent effect on the conformation of aromatic nitro groups

1967 ◽  
Vol 20 (11) ◽  
pp. 2381 ◽  
Author(s):  
ID Rae
Keyword(s):  
Solvent Effect ◽  
Nitro Group ◽  
Nitro Compounds ◽  
Dimethyl Sulphoxide ◽  
Aromatic Nitro Compounds ◽  
Aromatic Nitro

The differences between proton mangetic resonance spectra of aromatic nitro compounds in deuterochloroform and dimethyl sulphoxide solutions are interpreted in terms of increased steric requirements of the nitro group in the latter solvent. In suitably ortho-substituted aromatic nitro compounds this leads to twisting of the nitro group about the Ar- N bond.

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