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945745-53-9

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945745-53-9 Usage

Check Digit Verification of cas no

The CAS Registry Mumber 945745-53-9 includes 9 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 6 digits, 9,4,5,7,4 and 5 respectively; the second part has 2 digits, 5 and 3 respectively.
Calculate Digit Verification of CAS Registry Number 945745-53:
(8*9)+(7*4)+(6*5)+(5*7)+(4*4)+(3*5)+(2*5)+(1*3)=209
209 % 10 = 9
So 945745-53-9 is a valid CAS Registry Number.

945745-53-9Relevant articles and documents

Factors affecting orthogonality in the deprotection of 2,4-di-protected aromatic ethers employing solid-supported acids

Tangdenpaisal, Kassrin,Sualek, Supannee,Ruchirawat, Somsak,Ploypradith, Poonsakdi

experimental part, p. 4316 - 4325 (2009/10/17)

Selective deprotection of aromatic ethers bearing two protecting groups on the same aromatic ring by solid-supported acids (Amberlyst-15 and PTS-Si) was systematically investigated. ortho-Directing protonation by the carbonyl group as well as carbocation stability and quenching are the important determining factors for the orthogonal deprotection process. Stablilized carbocations (e.g., those from the MOM and PMB groups) could be removed with high selectivity.

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