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21223-02-9

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21223-02-9 Usage

Check Digit Verification of cas no

The CAS Registry Mumber 21223-02-9 includes 8 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 5 digits, 2,1,2,2 and 3 respectively; the second part has 2 digits, 0 and 2 respectively.
Calculate Digit Verification of CAS Registry Number 21223-02:
(7*2)+(6*1)+(5*2)+(4*2)+(3*3)+(2*0)+(1*2)=49
49 % 10 = 9
So 21223-02-9 is a valid CAS Registry Number.

21223-02-9Upstream product

21223-02-9Downstream Products

21223-02-9Relevant articles and documents

B(C6F5)3-Catalyzed Regioselective Deuteration of Electron-Rich Aromatic and Heteroaromatic Compounds

Li, Wu,Wang, Ming-Ming,Hu, Yuya,Werner, Thomas

, p. 5768 - 5771 (2017)

Deuterium labeled compounds find widespread application in life science. Herein, the deuteration of electron-rich (hetero)aromatic compounds employing B(C6F5)3 as the catalyst and D2O as the deuterium source is reported. This protocol is highly efficient, simply manipulated, and successfully applied in the deuteration of 23 substrates including natural neurotransmitter-like melatonin. It is assumed that the weakening of the O-D bond ultimately results in the formation of electrophilic D+.

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