55827-09-3

Upstream product

• 696-62-8 para-iodoanisole 
• 133752-62-2 C₁₁H₉ClOSZn 
• 3141-27-3 2,5-dibromothiophen 
• 5720-07-0 4-methoxyphenylboronic acid 
• 188290-36-0 thiophene 
• 528559-96-8 2,5-bis(n-butyltellanyl)thiophene 
• 768-60-5 4-methoxyphenylacetylen 
• 104-92-7 1-bromo-4-methoxy-benzene 
• 1085787-57-0 2,5-bis(triethylsilyl)thiophene 
• 54095-24-8 5-(4-methoxylphenyl)-2-bromothiophene 
• 874525-31-2 1,2-dibromo-1,2-di(4-methoxybenzoyl)ethane 
• 22779-05-1 1,4-bis(4-methoxyphenyl)-1,3-butadiyne 
• 16212-90-1 (Z)-1-benzylthio-1,4-di(p-methoxyphenyl)-1-buten-3-yne 
• 92802-29-4 2,6-di(4-methoxyphenyl)-1,4-dithiin 

Downstream Products

• 133730-75-3 2,5-bis(4-oxo-2,5-cyclohexadien-1-ylidene)-2,5-dihydrothiophene 
• 97595-21-6 2,5-bis-(4-hydroxyphenyl)thiophene 

Relevant academic research and scientific papers

Trithiocarbonate Anion as a Sulfur Source for the Synthesis of 2,5-Disubstituted Thiophenes and 2-Substituted Benzo[ b]thiophenes

The trithiocarbonate anion (CS32-) was generated in situ from CS2 and KOH in dimethyl sulfoxide by a simple method and used as a novel synthetic equivalent of the S2- synthon for the synthesis of 2,5-disubstituted thiophenes from 1,3-butadiynes. Additionally, this system was employed for the metal-free synthesis of 2-substituted benzo[b]thiophenes from 2-haloalkynyl (hetero)arenes. These compounds were obtained from a cheap and readily available sulfur source in moderate to good yields, with good functional group tolerance.

Selective Mechanochemical Monoarylation of Unbiased Dibromoarenes by in Situ Crystallization

Palladium-catalyzed Suzuki-Miyaura cross-coupling reactions of liquid, unbiased dibromoarenes under mechanochemical conditions selectively afford the monoarylated products. The lower reactivity of the crystalline monoarylated products relative to the liquid starting materials should be attributed predominantly to the low diffusion efficiency of the former in the reaction mixture, which results in a selective monoarylation. The present study sheds light on a novel approach using in situ phase transitions in solids to design selective organic transformations that are difficult to achieve via conventional solution-based synthesis.

Copper Nanoparticles on Ordered Mesoporous Carbon Nitride Support: a Superior Catalyst for Homo- and Cross-Coupling of Terminal Alkynes under Base-Free Conditions

A novel ordered mesoporous carbon nitride (OMCN) was synthesized as a functionalized support with 2,4,6-trichloro-1,3,5-triazine and benzidine as starting materials in the presence of SBA-15 as a template. Copper nanoparticles were then loaded on the C–N material to achieve a novel nanocomposite catalyst (Cu NPs-OMCN). The nanocomposite was utilized as a highly efficient catalyst for homo- and cross-coupling of terminal alkynes under base-free conditions in ethanol, and various symmetrical and unsymmetrical 1,3-diynes were obtained with good to excellent yields. Moreover, based on this reaction, a one-pot approach to synthesize 2,5-disubstituted thiophenes and furans from terminal alkynes were developed. Furthermore, the heterogeneous catalyst could be recovered and reused conveniently for several times with satisfactory yields.

Liquid crystal compounds and their production and use (by machine translation)

The invention discloses a type of heterocyclic discotic liquid crystal compounds, and a preparation method and an application thereof. A structural general formula of the heterocyclic discotic liquid crystal compounds is represented by the formula I. The compounds represented by the formula I are correct according to nuclear magnetic detection. Based on problems of few TN-type optical compensation film researches in current stage, few discotic liquid crystal material types, complicated synthesis process, and storage difficulty, the invention provides the series of heterocyclic discotic liquid crystal compounds with a novel microwave synthesis method. The type of compounds have the advantages of easy-to-obtain materials, simple preparation, and high total yield. The invention has important application value in the researches of development and application of optical compensation film materials.

Reversible light-directed self-organized 3D liquid crystalline photonic nanostructures doped with azobenzene-functionalized bent-shaped molecules

Blue phases in self-assembled 3D periodic nanostructures endowed with sensitive photoresponsive capability were prepared by doping bent-core molecules with photochromic azobenzene moieties. The molecular configurations are found to be critical to the stab

Aryl(triethyl)silanes for Biaryl and Teraryl Synthesis by Copper(II)-Catalyzed Cross-Coupling Reaction

Aryl(triethyl)silanes are found to undergo cross-coupling with iodoarenes in the presence of catalytic amounts of CuBr2and Ph-Davephos, as well as cesium fluoride as a stoichiometric base. Because the silicon reagents are readily accessible through catalytic C?H silylation of aromatic substrates, the net transformation allows coupling of aromatic hydrocarbons with iodoarenes via triethylsilylation.

The effects of asymmetric bent-shaped compounds on the temperature range and electro-optical performances of liquid crystalline blue phases

A series of asymmetric and symmetric bent-shaped molecules with branched terminals were synthesized and characterized. Their effects on inducing blue phase and electro-optical performances were compared and analyzed experimentally. It was found that the asymmetric and symmetric compounds almost have the same effect on inducing and stabilizing blue phase, but the electro-optical performance of mixtures doped with asymmetric compounds are much better than that of mixtures doped with symmetric compounds for they have a totally different dielectric anisotropy which can contribute to a larger Kerr constant.

Polymerizable mesogen compound having improved photoreactive efficiency and polymerizable liquid crystal compositions containing the same

The present invention relates to a polymerizable mesogen compound having improved photo-reaction efficiency by introducing an alpha-thiomethyl acrylate group as a photo-reactive group, and to a polymerizable liquid crystal composition containing the same. The polymerizable mesogen compound of the present invention has improved photo-reaction efficiency at a relatively low energy state by introducing an alpha-thiomethyl acrylate group as a photo-reactive group, retains excellent solubility in a host liquid crystal due to an asymmetric structure thereof, and improves stability of the pretilt angle after photo-crosslinking, and thus can be useful as a polymerizable liquid crystal composition, particularly, a polymerizable liquid crystal composition for a polymer stabilization alignment type liquid crystal display.

Thiophene-core estrogen receptor ligands having superagonist activity

To probe the importance of the heterocyclic core of estrogen receptor (ER) ligands, we prepared a series of thiophene-core ligands by Suzuki cross-coupling of aryl boronic acids with bromo-thiophenes and we assessed their receptor binding and cell biological activities. The disposition of the phenol substituents on the thiophene core, at alternate or adjacent sites, and the nature of substituents on these phenols, all contribute to binding affinity and subtype selectivity. Most of the bis(hydroxyphenyl)-thiophenes were ERβ selective, whereas the tris(hydroxyphenyl)-thiophenes were ERα selective; analogous furan-core compounds generally have lower affinity and less selectivity. Some diarylthiophenes show distinct superagonist activity in reporter gene assays, giving maximal activities 2-3 times that of estradiol, and modeling suggests that these ligands have a different interaction with a hydrogen-bonding residue in helix-11. Ligand-core modification may be a new strategy for developing ER ligands whose selectivity is based on having transcriptional activity greater than that of estradiol.

REACTIVE MESOGEN COMPOUND, LIQUID CRYSTAL COMPOSITION INCLUDING THE SAME, METHOD OF MANUFACTURING A DISPLAY PANEL, AND DISPLAY PANEL

A reactive mesogen compound, a liquid crystal composition including the reactive mesogen compound, a method of manufacturing a display panel, and a display panel are disclosed. The reactive mesogen compound may be activated by light having a wavelength be