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198978-09-5

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198978-09-5 Usage

Check Digit Verification of cas no

The CAS Registry Mumber 198978-09-5 includes 9 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 6 digits, 1,9,8,9,7 and 8 respectively; the second part has 2 digits, 0 and 9 respectively.
Calculate Digit Verification of CAS Registry Number 198978-09:
(8*1)+(7*9)+(6*8)+(5*9)+(4*7)+(3*8)+(2*0)+(1*9)=225
225 % 10 = 5
So 198978-09-5 is a valid CAS Registry Number.

198978-09-5Relevant articles and documents

Oxidative Generation of 1-Nitroalkyl Radicals and Their Addition Reaction to Olefins

Arai, Noriyoshi,Narasaka, Koichi

, p. 2525 - 2534 (2007/10/03)

1-Nitroalkyl radicals are generated by oxidation of potassium salt of 1-aci-nitroalkanes with ammonium hexanitratocerate(IV). When the oxidation is carried out in the presence of electron-rich olefins, such as silyl enol ethers, intermolecular addition of the radicals onto the olefins proceeds to afford β-nitro ketones, which are further converted to α,β-unsaturated ketones in high yield. Stereoselective construction of fused ring systems is achieved by intramolecular addition of 1-nitroalkyl radicals.

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