18150-93-1Relevant articles and documents
Photoinduced substitution reaction in halothiophenes. Quantum-mechanical and photochemical studies on nitro- and cyano-derivatives
Aloisi,D'Auria,Latterini,Elisei
, p. 2765 - 2770 (2001)
2-Iodo-5-nitrothiophene, 2,-bromo-5-cyanothiophene, 2-iodo-5-cyanothiophene, and 4-iodo nitrobenzene were studied by steady state and pulsed methods and by semi-empirical quantum-mechanical computations. The quantum yields for the direct and sensitized photoarylation of these haloromatics following the photocleavage of the carbon-halogen bond were measured in benzene. The transient species originated by direct and sensitized laser excitation were examined by nanosecond laser flash photolysis in benzene and methylcyclohexane. The transients were characterized in terms of absorption spectra and decay lifetimes, and the triplet states were also characterized by phosphorescence measurements in rigid matrices at low temperature. The quenching rate constants of the triplet states and the quantum yields for singlet oxygen production were determined in methylcyclohexane. Findings obtained with sensitizers of various triplet energy showed that an upper triplet state is involved in the photocleaveage of the carbon-halogen bond.
Synthesis of 2-Nitrothiophenes via Tandem Henry Reaction and Nucleophilic Substitution on Sulfur from β-Thiocyanatopropenals
Rong, Lin,Shen, Yingxia,Xiong, Guoxi,Gong, Yuefa
, p. 670 - 675 (2019/01/08)
A new synthetic route of 2-nitrothiophenes was described through a tetra-n-butylammonium fluoride-promoted or diisopropylethylamine-promoted tandem Henry reaction and nucleophilic substitution of nitromethane with 3-thiocyanatopropenals, which were conveniently prepared by the replacement reaction of 3-chloropropenals with potassium thiocyanate under a mild acidic condition.
PHOTOCHEMICAL ARYLATION OF 2-IODO-5-NITROTHIOPHENE
D'Auria, Maurizio
, p. 195 - 198 (2007/10/02)
The arylation of 2-iodo-5-nitrothiophene by a photochemical process has been investigated.This compound, in contrast with the photochemical behaviour of 5-iodothiophene-2-carbonitrile, gives the corresponding aryl and heteroaryl derivatives in good yields on irradiation in the presence of various aromatic substrates (benzene, naphthalene, thiophene).The photochemical reaction of 2-iodo-5-nitrothiophene in the presence of phenylacetylene gives the corresponding substitution product on the alkyne.