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31493-78-4

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31493-78-4 Usage

Check Digit Verification of cas no

The CAS Registry Mumber 31493-78-4 includes 8 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 5 digits, 3,1,4,9 and 3 respectively; the second part has 2 digits, 7 and 8 respectively.
Calculate Digit Verification of CAS Registry Number 31493-78:
(7*3)+(6*1)+(5*4)+(4*9)+(3*3)+(2*7)+(1*8)=114
114 % 10 = 4
So 31493-78-4 is a valid CAS Registry Number.

31493-78-4Relevant articles and documents

K2S2O8-mediated radical cyclisation of 2-alkynylthioanisoles or -selenoanisoles: a green and regioselective route to 3-nitrobenzothiophenes and benzoselenophenes

Gong, Ya-Ling,Lu, Shi-Chao,Wu, Botao,Xu, Shu,Zhang, Shi-Peng

, p. 19083 - 19087 (2020/06/08)

An acid, transition-metal, and chromatography-free radical nitration/cyclisation of 2-alkynylthioanisoles or -selenoanisoles has been developed. This is the first example of the use of highly unstable 2-nitrovinyl radicals for C-S bond formation. This facile route efficiently produces 3-nitrobenzothiophenes and benzoselenophenes, which are difficult to accessviaclassical methods. Density functional theory (DFT) calculations were carried out to probe the reaction mechanism. The resulting products were tested for theirin vitroanti-tuberculosis activity, and compounds2dand2lshowed significant activities against sensitive and drug-resistant strains.

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