24910-68-7

Upstream product

• 591-35-5 3,5-dichlorophenol 
• 507233-69-4 triphenyl bismuth ⁽²⁺⁾; dichloride 
• 98-80-6 phenylboronic acid 
• 108-70-3 1,3,5-trichlorobenzene 
• 108-95-2 phenol 
• 108-86-1 bromobenzene 
• 591-50-4 iodobenzene 

Relevant academic research and scientific papers

Synthesis and Characterization of New 1,3,5 -Triazine Derivatives Based on Benzene Ring

Liquid crystal materials have a number of ordinary uniqueness such as mechanical or electro-optical properties. New triazines derivatives compound was obtained starting from 1,3,5-triazine and 1,3,5-trichlorobenzene. The synthesized compound consists of three-armed, one arm of phenol and two armed of 2,4-bis-(dode-cyloxy)-6- ethynyltriazine that built up via reaction of triazine with dodecan-1-ol. The substitution was achieved efficiently at appropriate temperature under the argon atmosphere by cross coupling. However, the two armed of 2,4- bis(dodecyloxy)ethynyltriazine on the periphery are considered for liquid crystal application. The target compound did not exhibit a transition phase in its pure state but, after ionic interaction with 4-DBA which already possess a phase transition, it showed a phase transition and liquid crystal properties. We study the liquid crystal properties of obtained organic salts after ionic interaction through hydrogen bonding via methods of OPM "optical polarizing microscope"and DSC "differential calorimetric scanning). After purification with column chromatography then confirmed their structures by analysis of spectroscopy (MS, NMR, and FT-IR).

Ionic interaction of tri-armed structure based on benzene ring: synthesis and characterization

Abstract: Liquid crystalline is a state of matter which combines the properties of liquid and a crystalline solid. Ionic liquid crystals are a new class of materials which exhibit phase transition at low temperature. A new structure was synthesized based on a benzene ring carrying three armed, two arms of triazine ring and the third arm is phenoxy benzene. The presence of alkyl chain groups on the periphery reduced the mesophase transitions which are desirable for low-temperature applications of liquid crystals. The substitution was achieved efficiently by Sonogashira coupling. The tri-armed compound was synthesized successfully through cross-coupling. However, it was oily and no transition phase was observed. Therefore, to increase the liquid crystal possibility, the compound was mixed with 4-(dodecyloxy)benzoic acid (4-DBA) with 1:1 ratio to produce an organic salt through hydrogen bonding. The organic salt obtained by ionic interaction between the tri-armed compound and 4-DBA exhibited a phase transition at low temperature. However, ionic liquid crystals are important class of mesomorphic materials and have considered as sealants due to their very low vapour pressure which demonstrated a proficient electrolyte systems for their anisotropic phase such as high ionic conductivity and diffusion along with excellent thermal stability. All the intermediate compounds and final compounds were confirmed by spectroscopic techniques (1H NMR, 13C NMR, FT-IR, and HRMS). Graphic abstract: [Figure not available: see fulltext.].

Compound pyrene has and its preparation method, the organic electroluminescent device (by machine translation)

The present invention provides a method for preparing the same composition and pyrene, organic electroluminescent device, the compound pyrene has formula (I) is shown. Compared with the prior art, the present invention provides the compound pyrene derivatives [...] N in the introduction, or O and S Ar 1-Ar 5 of pyrene three-dimensional structure is formed, at the same time can be adjusted through the introduction of the group wavelength of the compound, so as to improve the formula (I) luminescence of compound shown in the organic electroluminescent device of the light-emitting efficiency and the life-SPAN of the device. (by machine translation)

Air-stable palladium(0) phosphine sulfide catalysts for Ullmann-type C-N and C-O coupling reactions

This paper describes an efficient procedure for palladium(0)-catalyzed N-arylation and O-arylation of aryl halides by Ullmann-type cross coupling reaction under mild reaction conditions in a short reaction time. Two phosphine sulphide ligands and their corresponding Pd(0) complexes namely [Pd(p2S2)(dba)] and [Pd(pp3S4)(dba)], were synthesized, where p2S2 is 1,2-bis(diphenylphosphino)ethane disulfide, pp3S4 is tris[2-(diphenylphosphino)ethyl]phosphine tetrasulfide and dba is dibenzylideneacetone. Optimal reaction conditions were determined for the arylation reactions using iodobenzene and benzimidazole by varying temperature, solvent, base and catalyst loading. The cross coupling reactions were carried out taking iodobenzenes/bromobenzenes and a wide variety of substituted aryl amines/phenols/alcohols with different steric and electronic properties to afford the desired N-aryl amines/diaryl ethers/alkyl aryl ethers in good to excellent yield (70-94%).

Copper-mediated synthesis of mono- and dichlorinated diaryl ethers

An efficient synthesis of polychlorinated diphenyl ethers (PCDEs) using the Cu(OAc)2-catalyzed Chan-Lam coupling reaction is described. A library of all possible mono- and dichlorinated diphenyl ether congeners was prepared and characterized using MS, 1H, and 13C NMR spectroscopy, and Kovats retention indices. Our approach, using the optimized reaction conditions (i.e., reaction temperature, oxidizing atmosphere and base), significantly improves and simplifies the process compared to previously reported syntheses.

THE CHEMISTRY OF PENTAVALENT ORGANOBISMUTH REAGENTS. PART X. STUDIES ON THE PHENYLATION AND OXIDATION OF PHENOLS

The influence of the substituents on the phenol on the regiochemistry of the arylation reactions with Ph3BiCl2 and other bismuth reagents has been studied.O-Phenylation occurs with phenols substituted with electron-withdrawing groups.Electron-donating substituted phenols undergo ortho C-phenylation.Oxidative dimerisation has been observed with 2,6-dialkyl phenols.