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1340-14-3

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1340-14-3 Usage

General Description

[(E)-2-bromoethenyl]benzene, also known as stilbene dibromide, is a chemical compound with the molecular formula C8H7Br. It is a colorless, odorless liquid with a boiling point of 234-236 °C. [(E)-2-bromoethenyl]benzene is primarily used as a reagent for the synthesis of various organic compounds, including pharmaceuticals and agrochemicals. It is also used as a precursor for the production of polymers and plastics. The compound is considered to be moderately toxic, with potential health hazards including skin and eye irritation. It is important to handle [(E)-2-bromoethenyl]benzene with care and use appropriate safety measures when working with it.

Check Digit Verification of cas no

The CAS Registry Mumber 1340-14-3 includes 7 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 4 digits, 1,3,4 and 0 respectively; the second part has 2 digits, 1 and 4 respectively.
Calculate Digit Verification of CAS Registry Number 1340-14:
(6*1)+(5*3)+(4*4)+(3*0)+(2*1)+(1*4)=43
43 % 10 = 3
So 1340-14-3 is a valid CAS Registry Number.

1340-14-3Relevant articles and documents

CHEMICAL EVIDENCE FOR STABILIZATION OF ELECTRICALLY NEUTRAL DIVALENT CARBON BY POLAR SOLVENTS

Tomioka, Hideo,Hayashi, Norihiro,Izawa, Yasuji

, p. 695 - 698 (1986)

Benzylhalocarbene generated in non-polar solvent is trapped readily by alkene, but the intermolecular process comes to compete poorly with the intramolecular process as the solvent polarity is increased.

Brown et al.

, p. 6456 (1973)

Regio- and stereoselective synthesis of bromoalkenes by homolytic hydrobromination of alkynes with hydrogen bromide

Kumaki, Wataru,Kinoshita, Hidenori,Miura, Katsukiyo

, (2022/03/07)

Homolytic hydrobromination of terminal and internal alkynes with a commercially available solution of hydrogen bromide in acetic acid has been investigated for regio- and stereoselective synthesis of bromoalkenes. Under an aerobic atmosphere at room temperature, the reaction of ethynylarenes with a small excess of HBr efficiently gave (2-bromoethenyl)arenes with good to high E-selectivity. (Alk-1-ynyl)arenes, or internal alkynes bearing both phenyl and alkyl groups at the sp-carbons also underwent the air-initiated hydrobromination to exhibit high Z-selectivity under kinetic conditions using a half equivalent of HBr.

Selective Rhodium-Catalyzed Hydroformylation of Terminal Arylalkynes and Conjugated Enynes to (Poly)enals Enabled by a π-Acceptor Biphosphoramidite Ligand

Zhao, Jiangui,Zheng, Xueli,Tao, Shaokun,Zhu, Yuxin,Yi, Jiwei,Tang, Songbai,Li, Ruixiang,Chen, Hua,Fu, Haiyan,Yuan, Maolin

supporting information, p. 6067 - 6072 (2021/08/16)

The hydroformylation of terminal arylalkynes and enynes offers a straightforward synthetic route to the valuable (poly)enals. However, the hydroformylation of terminal alkynes has remained a long-standing challenge. Herein, an efficient and selective Rh-catalyzed hydroformylation of terminal arylalkynes and conjugated enynes has been achieved by using a new stable biphosphoramidite ligand with strong π-acceptor capacity, which affords various important E-(poly)enals in good yields with excellent chemo- and regioselectivity at low temperatures and low syngas pressures.

Dual nickel- and photoredox-catalyzed reductive cross-coupling of aryl vinyl halides and unactivated tertiary alkyl bromides

Yu, Weijie,Chen, Long,Tao, Jiasi,Wang, Tao,Fu, Junkai

supporting information, p. 5918 - 5921 (2019/05/27)

A novel reductive cross-coupling of aryl vinyl halides and unactivated tertiary alkyl bromides has been realized via photoredox/nickel dual catalysis to produce vinyl arene derivatives bearing all-carbon quaternary centers with excellent E-selectivity. A stoichiometric metal reductant could be avoided by employing commercially available N,N,N′,N′-tetramethylethylenediamine (TMEDA) as the terminal reductant.

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