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257956-62-0

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257956-62-0 Usage

Check Digit Verification of cas no

The CAS Registry Mumber 257956-62-0 includes 9 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 6 digits, 2,5,7,9,5 and 6 respectively; the second part has 2 digits, 6 and 2 respectively.
Calculate Digit Verification of CAS Registry Number 257956-62:
(8*2)+(7*5)+(6*7)+(5*9)+(4*5)+(3*6)+(2*6)+(1*2)=190
190 % 10 = 0
So 257956-62-0 is a valid CAS Registry Number.

257956-62-0Downstream Products

257956-62-0Relevant articles and documents

Improved procedure for the reductive acetylation of acyclic esters and a new synthesis of ethers

Kopecky, David J.,Rychnovsky, Scott D.

, p. 191 - 198 (2007/10/03)

An optimized protocol for the DIBALH reductive acetylation of acyclic esters and diesters is described. This reductive acetylation procedure allows a wide variety of esters to be converted into the corresponding α-acetoxy ethers in good to excellent yields. It was found that, under mild acidic conditions, many α-acetoxy ethers can be further reduced to the corresponding ethers. This net two-step ester deoxygenation is an attractive alternative to the classical Williamson synthesis for certain ethers.

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