34512-02-2

Basic information

• Product Name: 1,2-di-[2]thienyl-ethylene
• CAS NO: 34512-02-2
• Molecular Weight: 192.306
• Mol File: 34512-02-2.mol

Chemical Properties

• CAS DataBase Reference: 1,2-di-[2]thienyl-ethylene(CAS DataBase Reference)
• NIST Chemistry Reference: 1,2-di-[2]thienyl-ethylene(34512-02-2)
• EPA Substance Registry System: 1,2-di-[2]thienyl-ethylene(34512-02-2)

Safety Data

• Hazardous Substances Data: 34512-02-2(Hazardous Substances Data)

Upstream product

• 1003-09-4 2-bromothiophene 
• 2627-95-4 tetramethyldivinyldisiloxane 
• 23975-15-7 1,2-di(thiophen-2-yl)ethyne 
• 201230-82-2 carbon monoxide 
• 540-59-0 1,2-Dichloroethylene 
• 37496-13-2 2-(trimethylstannyl)thiophene 
• 98-03-3 thiophene-2-carbaldehyde 
• 1918-82-7 2-vinylthiophene 
• 1271-51-8 vinyl ferrocene 
• 2026-42-8 diethyl thien-2-ylmethylphosphonate 
• 36331-49-4 2-thiophenecarbaldehyde tosylhydrazone 
• 5919-31-3 2-(diazomethyl)thiophene 

Downstream Products

• 1416262-95-7 benzyl 1-acetyl-4,5-di(thiophen-2-yl)-1H-pyrrole-2-carboxylate 

Relevant articles and documents

RHODIUM ION CATALYZED DECOMPOSITION OF ARYLDIAZOALKANES

Aryldiazomethanes are converted by rhodium(II)acetate and iodorhodium(III) tetraphenylporphyrin to cis- rather than trans-1,2-diarylethylenes.Secondary aryldiazoalkanes react with rhodium(II) acetate to give azines.

Unusual titanium-induced McMurry coupling of 4-oxo-4H-chromene-2-carbaldehydes enroute to bis-chromones

Ti/Zn-mediated McMurry coupling of a series of 4-oxo-4H-chromene-2-carbaldehydes afforded unusual chemoselective CH2-CH2tethered bis-chromones. Studying the reaction parameters and reagents further confirmed that the formation of unexpected coupled products is selective to 4-oxo-4H-chromene-2-carbaldehydes. This methodology demonstrated a simple and efficient route for the synthesis of bis-chromones.

Synthesis method of diarylethene

The invention discloses a synthetic method of diarylethene. The method comprise the following steps: potassium acetate and ultrapure water are added to a dry anaerobic tube, and stirred to be dissolved; then re-steamed N,N-dimethylformamide is added, and nitrogen is introduced for deoxygenation; reactants aryl bromide and 1,3-divinyl-1,1,3,3-tetramethyldisiloxane, catalyst palladium acetate, ligand tri-o-tolylphosphine and additive tetrabutylammonium bromide are added sequentially, nitrogen is introduced for deoxygenation, temperature is increased to 100 DEG C, and stirring is performed untila reaction is finished; diarylethene with yield as high as 90% or higher is obtained finally through a post-processing procedure. With adoption of the synthetic method of diarylethene, yield is high,ethylene gas and a pressure container not easy to operate are not needed, and the synthetic method can be widely applied to industrial production and has better market application prospect.

Synthetic method A-D-A configuration organic conjugated micromolecule

The invention provides a synthesis method of A-D-A conjugated small molecules. The method comprises the following steps: (1) by using 2-formylthiophene as a raw material and using zinc powder and titanium tetrachloride as catalysts, preparing a compound (I); (2) activating the site 2 of the compound (I) by using n-butyllithium, so as to form a lithium salt intermediate; then, adding 1-bromooctane to prepare a compound (II); (3) activating the site 2 of the compound (II) by using n-butyllithium, so as to form a lithium salt intermediate; then, adding trimethyltin chloride to prepare a compound (III); (4) performing reaction by 4,7-dibromo diazosulfide and the compound (III) to prepare a compound (IV); (5) respectively connecting 2-octyl trans-terthienyl based on diazosulfide onto the two ends of R1, R2, R3 and R4 to synthesize final products of S1, S2, S3 and S4.

Selective rhodium-catalyzed hydroformylation of alkynes to α,β-unsaturated aldehydes with a tetraphosphoramidite ligand

A tetraphosphoramidite ligand was successfully applied to a Rh-catalyzed hydroformylation of various symmetrical and unsymmetrical alkynes to afford corresponding α,β-unsaturated aldehyde products in good to excellent yields (up to 97% yield). Excellent chemo- and regioselectivities and high activities (up to 20 000 TON) were achieved. The corresponding α,β-unsaturated aldehyde products can be transformed into many useful and important organic molecules, such as indenamine derivatives and lukianol pyrroles. This great performance makes the hydroformylation of alkynes highly practical with great potential.

Evaporable organic semiconductive material and use thereof in an optoelectronic component

The invention relates to compounds of general formula IIIa and their use in optoelectronic components.

Identification and quantification of defect structures in poly(2,5-thienylene vinylene) derivatives prepared via the dithiocarbamate precursor route by means of NMR spectroscopy on 13C-labeled polymers

During the past decades several synthetic routes toward the low band gap polymer poly(2,5-thienylene vinylene) (PTV) and derivatives have been studied. This study describes an extensive NMR characterization of 13C-labeled 3-octyl-PTV and its precursor polymer prepared via the dithiocarbamate route which is, since stable monomers are available, a promising route toward PTV derivatives. By introducing 13C-labeled vinylene carbons, we were able to characterize these polymers in a quantitative way, taking the end groups and structural polymerization defects, which disturb the conjugated system, into account. Several NMR techniques and the synthesis of model compounds were used to fully assign the proton and carbon chemical shifts. Moreover, the classically used thermal conversion of the precursor toward the conjugated polymer has been compared to a smoother, acid-induced elimination procedure.

Electronic structural dependence of the photophysical properties of fluorescent heteroditopic ligands - Implications in designing molecular fluorescent indicators

Two fluorescent heteroditopic ligands (2a and 2b) for zinc ion were synthesized and studied. The efficiencies of two photophysical processes, intramolecular charge transfer (ICT) and photoinduced electron transfer (PET), determine the magnitudes of emission bathochromic shift and enhancement, respectively, when a heteroditopic ligand forms mono- or dizinc complexes. The electron-rich 2b is characterized by a high degree of ICT in the excited state with little propensity for PET, which is manifested in a large bathochromic shift of emission upon Zn2+ coordination without enhancement in fluorescence quantum yield. The electron-poor 2a displays the opposite photophysical consequence where Zn2+ binding results in greatly enhanced emission without significant spectral shift. The electronic structural effects on the relative efficiencies of ICT and PET in 2a and 2b as well as the impact of Zn2+-coordination are probed using experimental and computational approaches. This study reveals that the delicate balance between various photophysical pathways (e.g. ICT and PET) engineered in a heteroditopic ligand is sensitively dependent on the electronic structure of the ligand, i.e. whether the fluorophore is electron-rich or poor, whether it possesses a donor-acceptor type of structure, and where the metal binding occurs.

Thiazole-based semiconductor compound and organic thin film transistor using the same

Provided are an organic semiconductor compound using thiazole, and an organic thin film transistor having an organic semiconductor layer formed of the organic semiconductor compound using thiazole. The novel organic semiconductor compound including thiazole has liquid crystallinity and excellent thermal stability, and thus is provided to form an organic semiconductor layer in the organic thin film transistor. To this end, a silicon oxide layer is formed on a silicon substrate, and an organic semiconductor layer including thiazole is formed on the silicon oxide layer. In addition, source and drain electrodes are formed on both edge portions of the organic semiconductor layer. The organic thin film transistor using the organic semiconductor layer has an improved on/off ratio and excellent thermal stability. Also, a solution process can be applied in its manufacture.

Selective synthesis of 1-aryl-2-ferrocenylethylene by cross-metathesis

Novel synthesis of π-conjugated molecules by cross-metathesis reaction of vinylferrocene with a series of vinylarenes was investigated with a molybdenum-based Schrock catalyst (CHCMe2Ph)Mo(N-2,6-i-Pr2C6H3)[OCMe(C F3)2]2. The cross-metathesis reactions occurred successfully and the cross-metathesis product, i.e., heterodimers, were readily obtained selectively, together with only small amounts of the corresponding self-dimers.