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131657-47-1

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131657-47-1 Usage

Check Digit Verification of cas no

The CAS Registry Mumber 131657-47-1 includes 9 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 6 digits, 1,3,1,6,5 and 7 respectively; the second part has 2 digits, 4 and 7 respectively.
Calculate Digit Verification of CAS Registry Number 131657-47:
(8*1)+(7*3)+(6*1)+(5*6)+(4*5)+(3*7)+(2*4)+(1*7)=121
121 % 10 = 1
So 131657-47-1 is a valid CAS Registry Number.

131657-47-1Relevant articles and documents

Interception of amide ylides with sulfonamides: Synthesis of (: E)- N -sulfonyl amidines catalyzed by Zn(OTf)2

Chen, Jijun,Long, Wenhao,Fang, Shangwen,Yang, Yonggang,Wan, Xiaobing

supporting information, p. 13256 - 13259 (2017/12/26)

Through the interception of amide ylides with sulfonamides, we herein report the first general example of an intermolecular condensation reaction between sulfonamides and amides. Beyond formamides, this approach was successfully applied to a variety of lactams and linear amides, giving rise to a broad array of (E)-N-sulfonyl amidines.

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