Journal ArticleDOI
On the regioselectivity of the nucleophilic aromatic photosubstitutions of 4-nitroveratrole. A threefold mechanistic pathway
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In this article, it was shown that the reaction with hydroxide ion is probably a S N 2 3 Ar * process and with piperidine involves a radical ion pair formed via electron transfer from the amine to a triplet excited state.About:
This article is published in Tetrahedron.The article was published on 1988-01-01. It has received 30 citations till now. The article focuses on the topics: Piperidine & Hydroxide.read more
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Book ChapterDOI
'caged' compounds to probe the dynamics of cellular processes: synthesis and properties of some novel photosensitive p-2-nitrobenzyl esters of nucleotides
TL;DR: Photochemical release of substrates or regulatory molecules is a developing technique that overcomes problems such as diffusional delays in the kinetic study of biological processes involving macromolecular assemblies and the application of 2- nitrobenzyl phosphate esters in biological research is discussed.
Journal ArticleDOI
Photophysical Properties and Photosubstitution and Photoredox Reactions of Aromatic Nitro Compounds.
Ryoichi Nakagaki,Kiyoshi Mutai +1 more
TL;DR: In this paper, orientation rules for photochemical nucleophilic substitutions are deduced from intramolecular photoreactions of some bichromophoric chain molecules, p-O2NC6H4O(CH2)nNHC6H5.
Reference EntryDOI
Photochemistry of Nitro and Nitroso Compounds
Tong‐Ing Ho,Yuan L. Chow +1 more
TL;DR: Aromatic Nitro Compounds and Alkyl Nitrosamines - photolysis mechanisms as discussed by the authors were used to generate nitroaromatic anions and photosynthetic anions.
Journal ArticleDOI
Theoretical study of the orientation rules in photonucleophilic aromatic substitutions.
TL;DR: The photonucleophilic aromatic substitution reactions of nitrobenzene derivatives were studied by ab initio and Density Functional Theory methods and it is shown that the preference observed for the meta or para pathways in the addition step can be predicted by using the spin-polarized Fukui functions applied for the prereactive pi-complex.
Journal ArticleDOI
Photoreduction of 4-substituted nitrobenzenes by amines
TL;DR: In this article, the reduction of several nitrobenzenes bearing electron-donor and electron-withdrawing substituents in the 4-position by triethylamine in acetonitrile was studied by cyclic voltammetry, EPR spectroscopy, and steady-state photolysis.
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Journal ArticleDOI
Mechanisms of Photochemical Reactions in Solution. XXXIII. Intersystem Crossing Efficiencies
TL;DR: In this article, a simple method for measurement of quantum yields for the singlet→triplet crossing process in solution has been developed, where the compound to be tested is used as a sensitizer for one or more cis-trans isomerization reactions and the quantum yield of the induced process is measured.
Journal ArticleDOI
Time dependent fluorescence depolarization studies of BBOT
TL;DR: In this article, the rotational diffusion of 2,5-bis (5′-t-butyl-2-benzoxazylyl) thiophene (BBOT) in cyclohexane and ethanol was studied.
Journal ArticleDOI
Photochemical methoxide exchange in some nitromethoxybenzenes. Role of the nitro group in SN2 Ar reactions
Journal ArticleDOI
Aromatic photosubstitution reactions
E. Havinga,J. Cornelisse +1 more
TL;DR: In this article, the authors present a systematization based mainly on the nature and influence of substituents (electron attracting or donating) in the aromatic system and on kinetic features.