660437-82-1Relevant articles and documents
Novel Carbazole-Based N-Heterocyclic Carbene Ligands to Access Synthetically Relevant Stilbenes in Pd-Catalyzed Coupling Processes
Girase, Tejpalsingh Ramsingh,Kapdi, Anant R.
supporting information, p. 2611 - 2619 (2019/07/05)
A series of new carbazole-based N-heterocyclic carbene (NHC) ligands have been synthesized in a simple and facile synthetic route and subsequently used in a Pd/carbazole-based NHC catalytic system, which was found to be effective in catalyzing Heck reactions to provide substituted stilbene derivatives in good yields. Several bioactive stilbenes, including pterostilbene, pinosylvin, trimethoxy resveratrol, and resveratrol, were synthesized in good yields, and a 10 mmol scale-up was also performed for trimethoxy resveratrol. The synthetic application was also extended by performing a double-tandem chemoselective Heck reaction followed by Miyaura borylation in a one-pot procedure to give single-step access to synthetically useful stilbenyl boronate esters. Similarly, a unique triple-tandem protocol of a chemoselective Heck reaction/Miyaura borylation/Suzuki–Miyaura coupling reaction sequence was performed for the one-pot modification of biologically relevant molecules.
Cyanostilbene deriv., light-emitting element, the light emitting device, lighting device and electronic device
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, (2019/05/01)
PROBLEM TO BE SOLVED: To provide such a novel stilbene derivative which permits the luminescence of a shorter wavelength, as is useful for a light-emitting element of a high luminous efficiency, a light-emitting device having an excellent color reproducibility and having an electric power consumption decreased, or the like. SOLUTION: This stilbene derivative is expressed by formula G11 (in the formula, with regard to R10through R12, at least one of them is a tert-butyl group, and the remainder is a hydrogen atom; with regard to R13through R15, at least one of them is a tert-butyl group, and the remainder is a hydrogen atom; and Ar4to Ar5are each a (6-25)C aryl group). COPYRIGHT: (C)2013,JPOandINPIT
Gold(I) styrylbenzene, distyrylbenzene, and distyrylnaphthalene complexes: High emission quantum yields at room temperature
Gao, Lei,Niedzwiecki, Daniel S.,Deligonul, Nihal,Zeller, Matthias,Hunter, Allen D.,Gray, Thomas G.
scheme or table, p. 6316 - 6327 (2012/06/30)
One gold(I)-substituted styrylbenzene, six digold(I) distyrylbenzenes, one tetragold distyrylbenzene, and four digold distyrylnaphthalene complexes were synthesized using base-promoted auration, alkynylation, triazolate formation, and Horner-Wadsworth-Emmons reactions. The gold(I) fragments are either σ-bonded to the aromatic system, or they are attached through an alkynyl or triazolate spacer. Product formation was monitored using 31P{ 1H} NMR spectroscopy. Systems in which gold(I) binds to the central benzene ring or the terminal phenyl rings were designed. All of these complexes have strong ultraviolet absorptions and emit blue light. The position of the gold(I) attachment influences the luminescence efficiency. Complexes with two gold(I) fragments attached to the ends of the conjugated system have fluorescence quantum yields up to 0.94, when using 7-diethylamino-4- methylcoumarin as the emission standard. Density-functional theory calculations on three high-yielding emitters suggest that luminescence originates from the distyrylbenzene or -naphthalene bridge. Copyright
