23958-29-4

Upstream product

• 91110-68-8 1-bromo-4-((phenylsulfonyl)methyl)benzene 
• 1122-91-4 4-bromo-benzaldehyde 
• 51044-13-4 4-bromobenzyl triphenylphosphonium bromide 
• 589-15-1 1-bromomethyl-4-bromobenzene 
• 201230-82-2 carbon monoxide 
• 2789-89-1 1,2-bis(4-bromophenyl)acetylene 
• 18869-30-2 (E)-4,4'-dibromostilbene 
• 131240-32-9 fumaric acid bis-(4-bromo-phenyl ester) 
• 24523-45-3 bis-(4-bromo-benzylidene)-hydrazine 
• 64-19-7 acetic acid 
• 138534-92-6 Toluene-4-sulfonic acid 2,2-bis-(4-bromo-phenyl)-ethyl ester 
• 19350-68-6 p-bromobenzaldehyde tosylhydrazone 
• 2039-82-9 1-bromo-4-ethenyl-benzene 
• 1119-51-3 bromopentene 

Downstream Products

• 18869-30-2 (E)-4,4'-dibromostilbene 
• 5405-28-7 1,2-di(4-bromophenyl)-1,2-dibromoethane 
• 4720-99-4 1,2-Bis-(4-formylphenyl)-(Z)-ethene 
• 116942-09-7 cis-4,4'-bis(N,N-diphenylamino)stilbene 
• 1019779-55-5 cis-4-Bormo-9-(N,N-diphenylamino)stilbene 
• 1034917-77-5 (Z)-4-(4,4,5,5-tetramethyl-1,3,2-dioxaborolan)-4'-(4,4,5,5-tetramethyl-1,3,2-dioxaborolan-2-yl)stilbene 
• 174735-02-5 3,6-dibromophenanthrene 
• 955107-51-4 1,2-bis(4-(4'-chlorophenyl)phenyl)ethene 
• 1224691-56-8 4,4'-bis(2-N-methylaziridin-2-ylphenyl)stilbene 
• 1353220-68-4 4,4'-bis(2-naphthyl-4-tert-butylphenylamino)stilbene 
• 1353220-70-8 4,4'-bis(4-tert-butylphenyl-3,5-di-tert-butylphenylamino)stilbene 
• 7150-10-9 4,4'-dibromo-1,2-diphenylethanone 
• 37904-55-5 4-bromo-N-(4-methylbenzenesulfonyl)benzenecarboxamide 
• 36176-90-6 N-(4-bromobenzylidene)-4-methylbenzenesulfonamide 

Relevant academic research and scientific papers

Energy-Transfer-Mediated Photocatalysis by a Bioinspired Organic Perylenephotosensitizer HiBRCP

Energy transfer plays a special role in photocatalysis by utilizing the potential energy of the excited state through indirect excitation, in which a photosensitizer determines the thermodynamic feasibility of the reaction. Bioinspired by the energy-transfer ability of natural product cercosporin, here we developed a green and highly efficient organic photosensitizer HiBRCP (hexaisobutyryl reduced cercosporin) through structural modification of cercosporin. After structural manipulation, its triplet energy was greatly improved, and then, it could markedly promote the efficient geometrical isomerization of alkenes from the E-isomer to the Z-isomer. Moreover, it was also effective for energy-transfer-mediated organometallic catalysis, which allowed realization of the cross-coupling of aryl bromides and carboxylic acids through efficient energy transfer from HiBRCP to nickel complexes. Thus, the study on the relationship between structural manipulation and their photophysical properties provided guidance for further modification of cercosporin, which could be applied to more meaningful and challenging energy-transfer reactions.

Activation of Aptamers with Gain of Function by Small-Molecule-Clipping of Intramolecular Motifs

Click reactions have the advantages of high reactivity, excellent orthogonality, and synthetic accessibility. Inspired by click reactions, we propose the concept of “clipped aptamers”, whose binding affinity is regulated by the “clip”-like specific intera

Photocatalyst-free visible light promoted: E → Z isomerization of alkenes

A simple and green method of visible light driven photocatalytic E to Z isomerization of alkenes has been developed. A variety of (Z)-alkenes can be prepared in the presence of visible light, without any additional photocatalyst. This protocol features photocatalyst-free conditions, which are mild, tolerant, and operationally simple, and is easy to implement.

Simpler and Cleaner Synthesis of Variously Capped Cobalt Nanocrystals Applied in the Semihydrogenation of Alkynes

Unlike the classical organometallic approach, we report here a synthetic pathway requiring no reducing sources or heating to produce homogeneous hexagonal-close-packed cobalt nanocrystals (Co NCs). Involving a disproportionation process, this simple and fast (6 min) synthesis is performed at room temperature in the presence of ecofriendly fatty alcohols to passivate Co NCs. Through a recycling step, the yield of Co NCs is improved and the waste generation is limited, making this synthetic route cleaner. After an easy exchange of the capping ligands, we applied them as unsupported catalysts in the stereoselective semihydrogenation of alkynes.

Chemoselective semihydrogenation of alkynes catalyzed by manganese(i)-PNP pincer complexes

A general manganese catalyzed chemoselective semihydrogenation of alkynes to olefins in the presence of molecular hydrogen is described. The best results are obtained by applying the aliphatic Mn PNP pincer complex Mn-3c which allows the transformation of various substituted internal alkynes to the respective Z-olefins under mild conditions and in high yields. Mechanistic investigations based on experiments and computations indicate the formation of the Z-isomer via an outer-sphere mechanism.

The role of electron-transporting Benzo[f]quinoline unit as an electron acceptor of new bipolar hosts for green PHOLEDs

We prepared three new compounds [3,6-di(9H-carbazol-9-yl)phenanthrene (3,6-DCP), 2,9-di(9H-carbazol-9-yl)benzo[f]quinoline (2,9-DCBQ), and 3,9-di(9H-carbazol-9-yl)benzo[f]-quinoline (3,9-DCBQ)] containing phenanthrene or benzo[f]quinoline as an electron-withdrawing moiety and a carbazole as electron-donating moiety, respectively, as bipolar hosts for green phosphorescent organic light emitting diodes (PHOLEDs). We intentionally substituted nitrogen atom to the C-3 position of phenanthrene moiety to prepare benzo[f]quinolinegroup. And, we found that it allowed better electron transporting behavior than the phenanthrene moiety. Meanwhile, the benzo[f]quinoline/phenanthrene core moieties significantly improved the thermal stability of those host materials, which exhibited glass transition and decomposition temperatures of 132–139 and 395–427 °C, respectively. The green PHOLEDs which were fabricated with those host materials showed the lowest operating voltage of 4.7 V at 1000 cd/m2 when we used 3,9-DCBQ. Very interestingly, it has an asymmetric structure with completely separated HOMO and LUMO in space. In contrast, 3,6-DCP having phenanthrene and carbazole moieties showed much higher operating voltage of 6.1 V which imply that replacing nitrogen at the C-3 position of phenanthrene improves carrier transport, that is, electron transporting behavior. As a result, the 3,9-DCBQ-based PHOLED showed the best overall performance, exhibiting current and power efficiencies of 48.5 cd/A and 20.6 lm/W, respectively.

Ligand-controlled iridium-catalyzed semihydrogenation of alkynes with ethanol: highly stereoselective synthesis of E- and Z-alkenes

A ligand-controlled iridium-catalyzed semihydrogenation of alkynes to E- and Z-alkenes with ethanol was developed. Effective selectivity control was achieved by ligand regulation. The use of 1,2-bis(diphenylphosphino)ethane (DPPE) and 1,5-cyclooctadiene (COD) was critical for the stereoselective semihydrogenation of alkynes. The general applicability of this procedure was highlighted by the synthesis of more than 40 alkenes, with good stereoselectivities. The value of our approach in practical applications was investigated by studying the effects of pinosylvin and 4,4′-dihydroxystilbene (DHS) on zebrafish as a vertebrate model.

Triazine Functionalized Porous Covalent Organic Framework for Photo-organocatalytic E- Z Isomerization of Olefins

Visible light-mediated photocatalytic organic transformation has drawn significant attention as an alternative process for replacing thermal reactions. Although precious metal/organic dyes based homogeneous photocatalysts have been developed, their toxic and nonreusable nature makes them inappropriate for large-scale production. Therefore, we have synthesized a triazine and a keto functionalized nonmetal based covalent organic framework (TpTt) for heterogeneous photocatalysis. As the catalyst shows significant absorption of visible light, it has been applied for the photocatalytic uphill conversion of trans-stilbene to cis-stilbene in the presence of blue light-emitting diodes with broad substrate scope via an energy transfer process.

NEW COMPOUNDS SUITABLE AS CATALYSTS FOR POLYMERIZATION REACTIONS

The invention relates to a compound of formula (I) and a process for synthesizing said compound. The invention further relates to the use of said compound as a catalyst, preferably for polymerization, such as, olefin polymerization. The invention also relates to the polymers produced using said catalyst and articles comprising said polymers.

Porous organic polymer supported rhodium as a heterogeneous catalyst for hydroformylation of alkynes to α,β-unsaturated aldehydes

A new porous organic polymer supported rhodium catalyst (Rh/POL-BINAPa&PPh3) has been developed for the hydroformylation of various alkynes to afford the corresponding α,β-unsaturated aldehydes with high chem- and stereoselectivity, excellent catalytic activity and good reusability (10 cycles). The heterogeneous catalyst exhibited more catalytic activity than the comparable homogeneous Rh/BINAPa/PPh3 system.