27088-84-2Relevant articles and documents
Syntheses and properties of donor - Acceptor-type 2,5-diarylthiophene and 2,5-diarylthiazole
Masui, Kentaro,Mori, Atsunori,Okano, Kunihiko,Takamura, Kenji,Kinoshita, Motoi,Ikeda, Tomiki
, p. 2011 - 2014 (2004)
Equation presented. Syntheses of differently substituted 2,5-diarylthiophenes and 2,5-diarylthiazoles are carried out with the palladium-catalyzed C-H substitution reaction using AgF as an activator. Remarkably strong photoluminescence is observed in 2,5-
Bicyclic alkaloid compound, preparation method and applications thereof
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, (2018/11/03)
The present invention relates to a bicyclic alkaloid compound, or a tautomer, a stereoisomer, a racemate, the non-equal mixture of enantiomers, a geometric isomer, a solvate, a pharmaceutically acceptable salt or a prodrug thereof, and a pharmaceutical composition containing the compound. The invention further discloses uses of the compounds and the pharmaceutical composition thereof as drugs, especially as anti-inflammatory drugs and anti-fibrotic drugs.
Photon-Quantitative 6π-Electrocyclization of a Diarylbenzo[b]thiophene in Polar Medium
Li, Ruiji,Nakashima, Takuya,Galangau, Olivier,Iijima, Shunsuke,Kanazawa, Rui,Kawai, Tsuyoshi
supporting information, p. 1725 - 1730 (2015/08/06)
The high reactivity of 6π-electrocyclization in polar solvents has remained one of the important challenges for diarylethenes because of the emergence of a twisted intramolecular charge transfer (TICT) state at the excited state in such polar media, which usually quenches the photocyclization reaction. Herein we report on the preparation and highly efficient photocyclization of 2,3-diarylbenzo[b]thiophenes with nonsymmetric side-aryl units in a polar solvent. While the dithiazolylbenzo[b]thiophene showed a suppressed quantum yield of 6π-electrocyclization of 54% in methanol, the replacement of a thiazole unit with a thiophene ring led to a photon-quantitative 6π-cyclization reaction. The nonsymmetrical modification into the side-aryl units was considered to enhance the CH/π interactions between side-aryl units to support a photoreactive conformation in methanol. The stabilization of the photochromic reactive conformation is expected to suppress the formation of the TICT state at the excited state, leading to highly efficient photoreactivity.