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25063-81-4

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25063-81-4 Usage

Check Digit Verification of cas no

The CAS Registry Mumber 25063-81-4 includes 8 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 5 digits, 2,5,0,6 and 3 respectively; the second part has 2 digits, 8 and 1 respectively.
Calculate Digit Verification of CAS Registry Number 25063-81:
(7*2)+(6*5)+(5*0)+(4*6)+(3*3)+(2*8)+(1*1)=94
94 % 10 = 4
So 25063-81-4 is a valid CAS Registry Number.

25063-81-4Downstream Products

25063-81-4Relevant articles and documents

3-Hydroxypyrroles and 1H-Pyrrol-3(2H)-ones. Part 2. Scope and Limitations of the Synthesis of Pyrrol-3-ones by Pyrolysis of Aminomethylene Meldrum's Acid Derivatives.

McNab, Hamish,Monahan, Lilian C.

, p. 863 - 868 (2007/10/02)

Flash vacuum pyrolysis of N,N-disubstituted aminomethylene Meldrum's acid derivatives provides a route to 4,5-unsubstituted 1H-pyrrol-3(2H)-ones by a hydrogen-transfer-cyclisation sequence.Alkyl and aryl 1-substituted, 1,2-disubstituted, and 1,2,2-trisubstituted pyrrolones can be obtained.In competitive cases, there is little selectivity between hydrogen transfer from primary, secondary, or tertiary sites, although benzyl hydrogen atoms proved particularly reactive, giving a general synthesis of 2-phenyl-1H-pyrrol-3(2H)-ones.

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