138565-27-2

Upstream product

• 117635-47-9 2-(phenylbuta-1,3-diyn-1-yl)pyridine 
• 123784-07-6 2-(5-bromothiophen-2-yl)pyridine 
• 98-80-6 phenylboronic acid 
• 110-86-1 pyridine 
• 825-55-8 2-phenylthiophene 
• 109-04-6 2-bromo-pyridine 
• 162607-17-2 (5-bromothiophene-2-yl)boronic acid 

Relevant academic research and scientific papers

Water-soluble luminescent cyclometalated gold(III) complexes with cis-chelating bis(N-heterocyclic carbene) ligands: Synthesis and photophysical properties

A new class of cyclometalated AuIII complexes containing various bidentate C-deprotonated C^N and cis-chelating bis(N-heterocyclic carbene) (bis-NHC) ligands has been synthesized and characterized. These are the first examples of AuIII complexes supported by cis-chelating bis-NHC ligands. [Au(C^N)(bis-NHC)] complexes display emission in solutions under degassed condition at room temperature with emission maxima (λ max) at 498-633 nm and emission quantum yields of up to 10.1 %. The emissions are assigned to triplet intraligand (IL) π→π* transitions of C^N ligands. The AuIII complex containing a C^N (C-deprotonated naphthalene-substituted quinoline) ligand with extended π-conjugation exhibits prompt fluorescence and phosphorescence of comparable intensity with λmax at 454 and 611 nm respectively. With sulfonate-functionalized bis-NHC ligand, four water-soluble luminescent Au III complexes, including those displaying both fluorescence and phosphorescence, were prepared. They show similar photophysical properties in water when compared with their counterparts in acetonitrile. The long phosphorescence lifetime of the water-soluble AuIII complex with C-deprotonated naphthalene-substituted quinoline ligand renders it to function as ratiometric sensor for oxygen. Inhibitory activity of one of these water-soluble Au III complexes towards deubiquitinase (DUB) UCHL3 has been investigated; this complex also displayed a significant inhibitory activity with IC50 value of 0.15 μM.

Trisulfur radical anion as the key intermediate for the synthesis of thiophene via the interaction between elemental sulfur and NaO t Bu

A facile base-promoted sulfur-centered radical generation mode and a single-step protocol for the synthesis of thiophene derivatives using 1,3-diynes via the interaction between elemental sulfur and NaOtBu has been reported. EPR experiments revealed that the trisulfur radical anion acts as a key intermediate of this process. A plausible mechanism has been proposed.

Pd-catalyzed oxidative C-H/C-H cross-coupling of pyridines with heteroarenes

We have developed for the first time a general, concise and highly selective method for the C2-heteroarylation of pyridines and related azines with a broad range of heteroarenes via a two-fold C-H activation, which streamlines the previous approaches that require the activated azine N-oxide as the coupling partner.

Metal coordination compound, luminescence device and display apparatus

An electroluminescence device having a layer containing a specific metal coordination compound is provided. The metal coordination compound is represented by formula (1) below: MLmL′n??(1), wherein M is a metal atom of Ir, Pt, Rh or Pd; L and L′ are mutually different bidentate ligands; m is 1, 2 or 3 and n is 0, 1 or 2 with the proviso that m+n is 2 or 3; a partial structure MLm is represented by formula (2) shown below and a partial structure ML′n is represented by formula (3) or (4) shown below: The metal coordination compound of the formula (1) is characterized by having at least one aromatic substituent for at least one of CyN1, CyN2, CyC1 and CyC2. The metal coordination compound having the aromatic substituent is effective in providing high-efficiency luminescence, long-term high luminance, and less deterioration by current passing.

Method for the photochemical isomerization of organic compounds under the influence of a photosensitizer

The invention relates to a method for the photochemical isomerization of organic compounds, in particular for the photochemical conversion of tachysterol compounds into previtamin D compounds and of trans-vitamin D compounds into cis-vitamin D compounds, under the influence of radiation, by exposing a solution of the organic compound to be converted in the presence of a non-polymeric photosensitizer to light with approx. 300-1,000 nm wavelength, and by then isolating the resulting product, wherein a substituted thiophene derivative having a substantial absorption in said wavelength region is used as the photosensitizer. The invention also relates to a new photosensitizer to be used for said isomerization reaction.

(Pyridinylmethylidene)dithioles: Synthesis, Structure, and Reactivity

Spectral characteristics, an X-ray crystal structure, and molecular orbital calculations indicate that (pyridinylmethylidene)dithioles 3, prepared from butadiynyl precursors 4 and hydrogen sulfide in basic methanol, are analogous in their bonding to the parent 1-aza-6,6λ4-dithiapentalenes 1 which, according to ab initio studies at Hartree-Fock level, is best represented as an (iminomethylidene)dithiole.An interaction between the sulfur and the nitrogen atoms is evident from the significant polarization of the S-S bond in those isomers where the nitrogen is proximal to the dithiole moiety.A comparison of the calculated structures of 1 and 3 with experimental data, as well as preliminary calculations on the related system trithiapentalene 2, suggest that ab initio methods using a single determinant are inadequate to describe these hypervalent sulfur systems.For example, an asymmetric structure is calculated to be the minimum energy from for 2 in contradiction to experimental results.Electrophilic substitutions, ring rearrangement, and reaction with electron acceptors are described for 3.