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1239605-11-8

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1239605-11-8 Usage

Check Digit Verification of cas no

The CAS Registry Mumber 1239605-11-8 includes 10 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 7 digits, 1,2,3,9,6,0 and 5 respectively; the second part has 2 digits, 1 and 1 respectively.
Calculate Digit Verification of CAS Registry Number 1239605-11:
(9*1)+(8*2)+(7*3)+(6*9)+(5*6)+(4*0)+(3*5)+(2*1)+(1*1)=148
148 % 10 = 8
So 1239605-11-8 is a valid CAS Registry Number.

1239605-11-8Relevant articles and documents

Copper-Catalyzed Trifluoromethylation/Cyclization of Alkynes for Synthesis of Dioxodibenzothiazepines

Zhang, Zi-Qi,Xu, Yi-Hao,Dai, Jing-Cheng,Li, Yan,Sheng, Jie,Wang, Xi-Sheng

, p. 2194 - 2198 (2021/04/05)

A facile and efficient approach for the synthesis of the CF3-containing dioxodibenzothiazepines has been developed via copper-catalyzed trifluoromethylation/cyclization of alkynes utilizing a radical relay strategy. This method has demonstrated low cataly

Optimizing ligand structure for low-loading and fast catalysis for alkynyl-alcohol and-amine cyclization

Stubbs, James M.,Bridge, Benjamin J.,Blacquiere, Johanna M.

, p. 7928 - 7937 (2019/06/13)

A series of [Ru(Cp/Cp?)(PR2NR′2)(MeCN)]PF6 complexes were prepared, in which the steric and electronic properties of the primary coordination sphere were varied (R = Ph, t-Bu, Bn; and Cp vs. Cp?). These complexes were catalytically active in the cyclization of alkyne substrates with an intramolecular nucleophile (amine or alcohol) to produce 5-and 6-membered heterocycles. The effect of the 1° coordination sphere structure on catalyst performance was evaluated. Steric bulk around the metal centre was a key feature to achieve rapid catalysis at low temperatures. The catalyst [Ru(Cp)(Pt-Bu2NPh2)(MeCN)]PF6 gave a turnover number that was >1 order of magnitude more active than previous catalysts in the cyclization of the benchmark substrate 2-ethynylaniline. This catalyst is tolerant of a diversity of functional groups and is competent at the formation of various substituted indoles.

Synthesis of 2-(Trifluoromethyl)indoles via Domino Trifluoromethylation/Cyclization of 2-Alkynylanilines

Ye, Yibin,Cheung, Kelvin Pak Shing,He, Lisi,Tsui, Gavin Chit

supporting information, p. 1676 - 1679 (2018/03/23)

A new method for the synthesis of 2-(trifluoromethyl)indoles using easily accessible 2-alkynylanilines and a well-established fluoroform-derived CuCF3 reagent is described. This method utilizes a domino trifluoromethylation/cyclization strategy

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