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183997-46-8

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183997-46-8 Usage

Check Digit Verification of cas no

The CAS Registry Mumber 183997-46-8 includes 9 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 6 digits, 1,8,3,9,9 and 7 respectively; the second part has 2 digits, 4 and 6 respectively.
Calculate Digit Verification of CAS Registry Number 183997-46:
(8*1)+(7*8)+(6*3)+(5*9)+(4*9)+(3*7)+(2*4)+(1*6)=198
198 % 10 = 8
So 183997-46-8 is a valid CAS Registry Number.

183997-46-8Downstream Products

183997-46-8Relevant articles and documents

Various synthetic approaches to fluoroalkyl p-nitrophenyl ethers

Preschera, Dietrich,Thiele, Thomas,Ruhmann, Ralf

, p. 145 - 148 (2007/10/03)

Homologous 1H,1H-perfluoroalkyl p-nitrophenyl ethers (alkyl = C2-C8) were synthesized using different methods. The results are discussed in context with contradictory comments of the literature. The fluoroalkoxylation of p-chloronitrobenzene occurs in only one step, but it is limited to small fluoroalkyl groups. The fluoroalkylation of p-nitrophenol via sulphonic acid esters is a better synthetic route. Differences in reactivity and yield between tosylates, mesylates and inflates are found and discussed. The preferred synthesis includes the use of trifluoromethane sulphonic acid esters.

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