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514225-43-5

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514225-43-5 Usage

Check Digit Verification of cas no

The CAS Registry Mumber 514225-43-5 includes 9 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 6 digits, 5,1,4,2,2 and 5 respectively; the second part has 2 digits, 4 and 3 respectively.
Calculate Digit Verification of CAS Registry Number 514225-43:
(8*5)+(7*1)+(6*4)+(5*2)+(4*2)+(3*5)+(2*4)+(1*3)=115
115 % 10 = 5
So 514225-43-5 is a valid CAS Registry Number.

514225-43-5Relevant articles and documents

An efficient synthesis of 2,3-dihydro-1H-pyrimido[1,2-a]quinoxaline 6-oxides

Garcia, Maria B.,Orelli, Liliana R.,Magri, Maria L.,Perillo, Isabel A.

, p. 2687 - 2690 (2007/10/03)

5-Substituted 2,3-dihydro-1H-pyrimido[1,2-a]quinoxaline 6-oxides 1a-f were synthesized by ring closure of N-acyl-N′-(o-nitroaryl)-1,3-propanediamines 2 with ethyl polyphosphate (PPE) or trimethylsilyl polyphosphate (PPSE) to the corresponding 2-substituted 1-(o-nitroaryl)-1,4,5,6-tetrahydropyrimidines 3, followed by spontaneous heterocyclization. The method was extended to the synthesis of the homologous 6-aryl- 1,2,3,4-tetrahydro- 1,3-diazepino[1,2-a]quinoxaline 7-oxide (1g).

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