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920449-57-6

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920449-57-6 Usage

Check Digit Verification of cas no

The CAS Registry Mumber 920449-57-6 includes 9 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 6 digits, 9,2,0,4,4 and 9 respectively; the second part has 2 digits, 5 and 7 respectively.
Calculate Digit Verification of CAS Registry Number 920449-57:
(8*9)+(7*2)+(6*0)+(5*4)+(4*4)+(3*9)+(2*5)+(1*7)=166
166 % 10 = 6
So 920449-57-6 is a valid CAS Registry Number.

920449-57-6Downstream Products

920449-57-6Relevant articles and documents

BIARYL HYDROXYTHIOPHENE GROUP IV TRANSITION METAL POLYMERIZATION CATALYSTS WITH CHAIN TRANSFER CAPABILITY

-

, (2022/02/05)

Catalyst systems that include a chain transfer agent and a metal-ligand complex according to formula (I).

Synthesis of heteroaryl compounds through cross-coupling reaction of aryl bromides or benzyl halides with thienyl and pyridyl aluminum reagents

Chen, Xu,Zhou, Lingmin,Li, Yimei,Xie, Tao,Zhou, Shuangliu

, p. 230 - 239 (2014/01/17)

An efficient method for synthesis of useful biaryl building blocks containing 2-thienyl, 3-thienyl, 2-pyridyl, and 3-pyridyl moieties was provided through cross-coupling reactions of aryl bromides or benzyl halides with heteroaryl aluminum reagents in the presence of Pd(OAc)2 and (o-tolyl)3P. The coupling reaction also worked efficiently with heteroaryl bromides affording series of heterobiaryl compounds. The reaction of phenylbromide with in situ prepared 3-pyridyl aluminum was demonstrated to afford the product 8a in high yield. Additionally, the catalytic system was also suited well for the coupling reaction of benzyl halides with pyridyl aluminum reagents to afford series of pyridyl-arylmethane.

Kumada-Tamao-Corriu coupling of heteroaromatic chlorides and aryl ethers catalyzed by (IPr)Ni(allyl)Cl

Iglesias, Maria Jose,Prieto, Auxiliadora,Nicasio, M. Carmen

supporting information, p. 4318 - 4321 (2012/10/29)

The complex (IPr)Ni(allyl)Cl (IPr = 1,3-bis(2,6-diisopropylphenyl) imidazolidene) catalyzes the cross-coupling reactions of heteroaromatic chlorides with aryl Grignard reagents. Catalyst loadings as low as 0.1 mol % have been used to afford the products in excellent yields. This nickel-based catalytic system also promotes the activation of the CAr-O bond of anisoles in the Kumada-Tamao-Corriu reaction under fairly mild conditions.

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