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25674-55-9

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25674-55-9 Usage

Check Digit Verification of cas no

The CAS Registry Mumber 25674-55-9 includes 8 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 5 digits, 2,5,6,7 and 4 respectively; the second part has 2 digits, 5 and 5 respectively.
Calculate Digit Verification of CAS Registry Number 25674-55:
(7*2)+(6*5)+(5*6)+(4*7)+(3*4)+(2*5)+(1*5)=129
129 % 10 = 9
So 25674-55-9 is a valid CAS Registry Number.

25674-55-9Relevant articles and documents

Application of directed metalation in synthesis. Part 6: A novel anionic rearrangement under directed metalation conditions leading to heteroannulation

Pradhan, Tarun Kanti,Mukherjee, Chandrani,Kamila, Sukanta,De, Asish

, p. 5215 - 5224 (2007/10/03)

A short and efficient synthesis of condensed 1,4-oxathiin-2-ones from easily available phenols is described. The key step in this synthesis is a hitherto unreported anionic rearrangement under directed metalation conditions. The rearrangement occurs after

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