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819072-81-6

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819072-81-6 Usage

Check Digit Verification of cas no

The CAS Registry Mumber 819072-81-6 includes 9 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 6 digits, 8,1,9,0,7 and 2 respectively; the second part has 2 digits, 8 and 1 respectively.
Calculate Digit Verification of CAS Registry Number 819072-81:
(8*8)+(7*1)+(6*9)+(5*0)+(4*7)+(3*2)+(2*8)+(1*1)=176
176 % 10 = 6
So 819072-81-6 is a valid CAS Registry Number.

819072-81-6Relevant articles and documents

A new regioselective synthesis and ambient light photochemistry of quinazolin-1-oxides

Co?kun, Necdet,?etin, Meliha

, p. 2966 - 2972 (2007/10/03)

Quinazolin-1-oxides were prepared by the oxidation of tetrahydroquinazolines with H2O2-tungstate and their ambient light photochemistry was investigated. Substituent effects on their photochemical cyclization and the reactions of the products 1aH-[1,2]oxazireno[2,3-a]quinazolines under photochemical and thermal conditions are reported. The cyclization of quinazolin-1-oxides and the reactions of 1aH-[1,2]oxazireno[2,3-a]quinazolines show pronounced solvent isotope and solvent effects.

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