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1548227-78-6

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1548227-78-6 Usage

Check Digit Verification of cas no

The CAS Registry Mumber 1548227-78-6 includes 10 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 7 digits, 1,5,4,8,2,2 and 7 respectively; the second part has 2 digits, 7 and 8 respectively.
Calculate Digit Verification of CAS Registry Number 1548227-78:
(9*1)+(8*5)+(7*4)+(6*8)+(5*2)+(4*2)+(3*7)+(2*7)+(1*8)=186
186 % 10 = 6
So 1548227-78-6 is a valid CAS Registry Number.

1548227-78-6Relevant articles and documents

Utility of Ketonic Mannich Bases in Synthesis of Some New Functionalized 2-Pyrazolines

Afsah, Elsayed M.,Keshk, Eman M.,Abdel-Rahman, Abdel-Rahman H.,Jomah, Najla F.

, p. 326 - 334 (2017/12/26)

The styryl ketonic Mannich base 2 has been used as a precursor in the synthesis of 2-pyrazolines having a basic side chain at C-3 and a phenolic Mannich base at C-5. Treatment of the bis(styryl ketonic bases) 6a and 8a with phenylhydrazine affords the bis(3-functionalized 2-pyrazolines) 7 and 9. The transamination between the styryl keto base 10 and 4-aminoantipyrine leads to 12, which reacts with piperazine to give 13. N-Nitrosation of the sec-Mannich bases 15a–d followed by reductive cyclization affords 2-pyrazolines 17a–d. The keto base 14b has been used for the synthesis of 2-pyrazolines having a phenolic Mannich base at C-3 and its reaction with 3,5-dimethyl-1H-pyrazole affords 23. The alkylation of 3-methyl-1-phenyl-2-pyrazolin-5-one with the bis(Mannich base) 25 was investigated.

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