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199939-07-6

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199939-07-6 Usage

Check Digit Verification of cas no

The CAS Registry Mumber 199939-07-6 includes 9 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 6 digits, 1,9,9,9,3 and 9 respectively; the second part has 2 digits, 0 and 7 respectively.
Calculate Digit Verification of CAS Registry Number 199939-07:
(8*1)+(7*9)+(6*9)+(5*9)+(4*3)+(3*9)+(2*0)+(1*7)=216
216 % 10 = 6
So 199939-07-6 is a valid CAS Registry Number.

199939-07-6Relevant articles and documents

Preparation of ortho-Aryl-benzaldehyde Derivatives via Free-Radical ipso-Substitution of an Amidomethyl Group

Giraud, Luc,Lacote, Emmanuel,Renaud, Philippe

, p. 2148 - 2156 (1997)

Preparation of 2-biarylcarbaldehydes using an intramolecular free-radical ipso-substitution is described. The two aryl moieties to be coupled are pre-associated using a glycolamide derivative. An unusual amidomethyl leaving group was successfully employed in this process.

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