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21166-39-2

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21166-39-2 Usage

Check Digit Verification of cas no

The CAS Registry Mumber 21166-39-2 includes 8 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 5 digits, 2,1,1,6 and 6 respectively; the second part has 2 digits, 3 and 9 respectively.
Calculate Digit Verification of CAS Registry Number 21166-39:
(7*2)+(6*1)+(5*1)+(4*6)+(3*6)+(2*3)+(1*9)=82
82 % 10 = 2
So 21166-39-2 is a valid CAS Registry Number.

21166-39-2Relevant articles and documents

Rh(III)-catalyzed cyclization reaction of azoles with alkynes: Efficient synthesis of azole-fused-pyridines

Chen, Xuebing,Wu, Youzhi,Xu, Jinyi,Yao, Hequan,Lin, Aijun,Huang, Yue

, p. 9186 - 9189 (2015/09/07)

A Rh(III)-catalyzed cyclization of azoles with alkynes has been developed. A variety of azole-fused-pyridines were obtained in good to excellent yields and regioselectivity. Both the C5 and the C4 position of azoles were suitable for the reaction.

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