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20951-13-7

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20951-13-7 Usage

Check Digit Verification of cas no

The CAS Registry Mumber 20951-13-7 includes 8 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 5 digits, 2,0,9,5 and 1 respectively; the second part has 2 digits, 1 and 3 respectively.
Calculate Digit Verification of CAS Registry Number 20951-13:
(7*2)+(6*0)+(5*9)+(4*5)+(3*1)+(2*1)+(1*3)=87
87 % 10 = 7
So 20951-13-7 is a valid CAS Registry Number.

20951-13-7Relevant articles and documents

High Chemoselectivity in the Construction of Aryl Methyl Sulfones via an Unexpected C-S Bond Formation between Sulfonylhydrazides and Dimethyl Phosphite

Liu, Teng,Yu, Shiwen,Shen, Xiang,Li, Yixian,Liu, Jianjun,Huang, Chao,Cheng, Feixiang

, p. 153 - 160 (2021/10/04)

A highly chemoselective route to aryl methyl sulfones via an unexpected C S bond formation between sulfonylhydrazides and dimethyl phosphite catalyzed by NaI under mild conditions has been established. This transformation provides an alternative and metal-free pathway to acquire various aryl methyl sulfones in good to excellent yields. Notably, dimethyl phosphite was employed as a stable and readily available alkyl source.

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