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1621431-71-7

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1621431-71-7 Usage

Check Digit Verification of cas no

The CAS Registry Mumber 1621431-71-7 includes 10 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 7 digits, 1,6,2,1,4,3 and 1 respectively; the second part has 2 digits, 7 and 1 respectively.
Calculate Digit Verification of CAS Registry Number 1621431-71:
(9*1)+(8*6)+(7*2)+(6*1)+(5*4)+(4*3)+(3*1)+(2*7)+(1*1)=127
127 % 10 = 7
So 1621431-71-7 is a valid CAS Registry Number.

1621431-71-7Downstream Products

1621431-71-7Relevant articles and documents

An Approach to Quinoline-Fused Imidazopyridines via CDC of Ethers with Imidazopyridines under Metal-Free Conditions

Lian, Guifang,Li, Jingyu,Liu, Ping,Sun, Peipei

, p. 16346 - 16354 (2019)

An NH4I-catalyzed cross-dehydrogenative coupling (CDC) reaction of ethers with imidazopyridine cascade cyclization under transition-metal-free conditions has been developed. Cheap, commercially available ethers were used as both reagents and solvents, and green aqueous H2O2 was used as an oxidizing agent. A series of substituents on 2-(2-aminoaryl) imidazo[1,2-a]pyridines were tolerated, and the reaction gave quinoline-fused imidazopyridines in moderate to good yields.

An expeditious microwave assisted one-pot sequential route to pyrido fused imidazo[4,5-c] quinolines in green media

Rao, Ramdas Nishanth,Chanda, Kaushik

, p. 3280 - 3289 (2021/02/26)

An expeditious microwave assisted one-pot sequential route to synthesize pyrido fused imidazo[4,5-c]quinolinesviathe Pictet-Spengler cyclization strategy has been developed. In this study, substituted 2-amino pyridines are condensed with 2-bromo-2′-nitroa

One-pot sequential reactions featuring a copper-catalyzed amination leading to pyrido[2′,1′:2,3]imidazo[4,5-c]quinolines and dihydropyrido[2′,1′:2,3]imidazo[4,5-c]quinolines

Fan, Xue-Sen,Zhang, Ju,Li, Bin,Zhang, Xin-Ying

, p. 1281 - 1285 (2015/06/08)

Tetracyclic skeletons combining an imidazo[1,2-a]pyridine moiety with a quinoline framework such as pyrido[2′,1′:2,3]imidazo[4,5-b]quinoline are stimulating increasing interests since they are close isosteres of a series of powerful antiproliferative comp

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