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628291-55-4

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628291-55-4 Usage

Check Digit Verification of cas no

The CAS Registry Mumber 628291-55-4 includes 9 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 6 digits, 6,2,8,2,9 and 1 respectively; the second part has 2 digits, 5 and 5 respectively.
Calculate Digit Verification of CAS Registry Number 628291-55:
(8*6)+(7*2)+(6*8)+(5*2)+(4*9)+(3*1)+(2*5)+(1*5)=174
174 % 10 = 4
So 628291-55-4 is a valid CAS Registry Number.

628291-55-4Relevant articles and documents

Michael addition of activated nitriles to 4[(+)-camphor-10′-sulfonylamino]-acetophenone and some of its chalcones

El-Shehawy, Ashraf A.,Attia, Adel M. E.

, p. 1129 - 1142 (2007/10/03)

4-[(+)-Camphor-10′-sulfonylamino]acetophenone (2) and some of its chalcones 3 were easily prepared in quantitative yields starting from (+)-camphor-10-sulfonyl chloride. Several new 2-oxo-, 2-thio-, as well as 2-amino-pyridines carrying the camphor sulfonylamino group as a substituent were synthesized easily in one step by Michael addition of several activated nitriles to compounds 2 and 3. The synthesis of some fused pyridines also was investigated.

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