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201216-01-5

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201216-01-5 Usage

Check Digit Verification of cas no

The CAS Registry Mumber 201216-01-5 includes 9 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 6 digits, 2,0,1,2,1 and 6 respectively; the second part has 2 digits, 0 and 1 respectively.
Calculate Digit Verification of CAS Registry Number 201216-01:
(8*2)+(7*0)+(6*1)+(5*2)+(4*1)+(3*6)+(2*0)+(1*1)=55
55 % 10 = 5
So 201216-01-5 is a valid CAS Registry Number.

201216-01-5Relevant articles and documents

Hantzsch Ester as a Visible-Light Photoredox Catalyst for Transition-Metal-Free Coupling of Arylhalides and Arylsulfinates

Zhu, Da-Liang,Wu, Qi,Li, Hai-Yan,Li, Hong-Xi,Lang, Jian-Ping

supporting information, p. 3484 - 3488 (2020/03/05)

Diethyl 2,6-dimethyl-1,4-dihydropyridine-3,5-dicarboxylate (HEH) has been utilized as a visible-light photoredox catalyst for the cross coupling of arylhalides and arylsulfinates without transition metal, sacrificial agent, and mediator. This method is compatible with various functional groups and provides diaryl sulfones in good to high yields. Mechanistic studies indicate that this reaction undergoes the stepwise light irradiation of HE?, single electron transfer (SET) in donor–acceptor complex (DAC) from *HE? to arylhalide, trapping of aryl radical with sulfinate, and SET oxidation of sulfone radical anion by HE. to sulfone by the DAC method.

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