Book ChapterDOI
Recent aspects of homolytic aromatic substitutions
TLDR
The homolytic substitution acquires a more significant weight in the field of the aromatic substitutions, characterized by high selectivity and versatility.Abstract:
A common aspect characterizing both the homolytic animation and the substitution of protonated hetero-aromatic bases by nucleophilic free radicals is the presence of a nitrogen atom with a positive charge. This presence determines strong polar effects whether it characterizes the radical (\(R_2 \mathop N\limits_ + H\)) or the aromatic substrate (protonated base). The awareness that the global polar effects result from the polar characteristics of both the radical and the substrate has led to new homolytic aromatic substitutions, characterized by high selectivity and versatility. Thus the homolytic substitution acquires a more significant weight in the field of the aromatic substitutions.read more
Citations
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Journal ArticleDOI
Iron-Catalyzed Reactions in Organic Synthesis
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Transition-Metal-Free Coupling Reactions
TL;DR: This research presents a new generation of state-of-the-art materials for bioorganic and non-volatile organometallic research that combines high-performance liquid chromatography and high-tech materials for organic synthesis.
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Electron-transfer processes: peroxydisulfate, a useful and versatile reagent in organic chemistry
Journal ArticleDOI
Distonic radical cations in gaseous and condensed phase
TL;DR: In this paper, the authors demontre que les radicaux cationiques CH 3 OH +, CH 3 NH 2 + and CH 3 ClH + ont des isomeres stables.
Journal ArticleDOI
Synthesis using aromatic homolytic substitution—recent advances
W. Russell Bowman,John Storey +1 more
TL;DR: The critical review illustrates the mechanistic considerations required for planning synthetic applications and a wide range of synthetic protocols and natural product syntheses are shown.
References
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Journal ArticleDOI
Electron spin resonance studies of transient alkyl radicals
TL;DR: In this article, the ESR lines are found to be narrow; considerable fine structure is observable, permitting positive assignment of the radical species, and accurate hyperfine constants are reported for 21 alkyl and cycloalkyl radicals, including several deuterated species.
Journal ArticleDOI
III - Bond energies
TL;DR: In this article, the authors examined methods for measuring bond dissociation energies, some representative values of such energies, structural aspects of the dissociation energy, and bond energies in ionized species.
BookDOI
Advances in linear free energy relationships
N. B. Chapman,John Shorter +1 more
TL;DR: In this article, the Hammett Equation and the present position were separated by the use of Linear Free Energy Relationships (LFE) and Optical Spectroscopy (OS).
Journal ArticleDOI
Cyclization of N-Halogenated Amines (The Hofmann-Löffler Reaction).
Journal ArticleDOI
Nucleophilic character of alkyl radicals—VI : A new convenient selective alkylation of heteroaromatic bases
TL;DR: In this paper, a new method of homolytic alkylation of heteroaromatic bases is described, in which the silver-catalysed oxidative decarboxylation of acids by peroxydisulphate is used as a source of alkyl radicals.