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189252-18-4

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189252-18-4 Usage

Check Digit Verification of cas no

The CAS Registry Mumber 189252-18-4 includes 9 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 6 digits, 1,8,9,2,5 and 2 respectively; the second part has 2 digits, 1 and 8 respectively.
Calculate Digit Verification of CAS Registry Number 189252-18:
(8*1)+(7*8)+(6*9)+(5*2)+(4*5)+(3*2)+(2*1)+(1*8)=164
164 % 10 = 4
So 189252-18-4 is a valid CAS Registry Number.

189252-18-4Relevant articles and documents

Br?nsted Acid-Catalyzed Synthesis of N-Arylindoles from 2-Vinylanilines and Quinones

Zhang, Han-Ming,Gao, Zhong-Hua,Yi, Liang,Ye, Song

, p. 2671 - 2674 (2016)

In the presence of a quinone, Br?nsted acid-catalyzed intramolecular C?N bond formation of o-vinylanilines by electrophilic cyclization was developed, giving the corresponding N-arylindoles in good to high yields. The reaction worked well for o-vinylanilines with terminal and internal C=C double bonds.

PEG-400 as a carbon synthon: Highly selective synthesis of quinolines and methylquinolines under metal-free conditions

Ding, Chengcheng,Feng, Kaili,Li, Shichen,Ma, Chen

supporting information, p. 5542 - 5548 (2021/08/16)

A metal-free, peroxide-free, and efficient procedure for the highly selective synthesis of quinolines and methylquinolines was reported. The main feature of this method was that the same substrate can produce quinolines and methylquinolines, respectively, under different reaction conditions. PEG-400 was used as both a reactant and solvent in this reaction. The utility of the designed procedure was also demonstrated by the derivatization of the products to bioactive compounds. This journal is

Ir(iii)-Catalysed electrooxidative intramolecular dehydrogenative C-H/N-H coupling for the synthesis of N-H indoles

Chang, Sukbok,Kim, Dongwook,Kim, Youyoung

, p. 12309 - 12312 (2021/12/07)

Herein, an iridium(iii)-catalysed electrooxidative intramolecular dehydrogenative C-H/N-H coupling of unprotected 2-alkenyl anilines is described. The developed method allows the synthesis of a variety of 3-substituted N-H indole scaffolds under undivided electrolytic conditions. Mechanistic studies suggest that the reaction proceeds through the electro-oxidation induced reductive elimination pathway.

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