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199865-07-1

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199865-07-1 Usage

Check Digit Verification of cas no

The CAS Registry Mumber 199865-07-1 includes 9 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 6 digits, 1,9,9,8,6 and 5 respectively; the second part has 2 digits, 0 and 7 respectively.
Calculate Digit Verification of CAS Registry Number 199865-07:
(8*1)+(7*9)+(6*9)+(5*8)+(4*6)+(3*5)+(2*0)+(1*7)=211
211 % 10 = 1
So 199865-07-1 is a valid CAS Registry Number.

199865-07-1Relevant articles and documents

New many fold 1,2,3-selenadiazole aromatic derivatives

Al-Smadi, Mousa,Ratrout, Samer

, p. 887 - 891 (2004)

The many fold aromatic ketones 2a-d are versatile compounds for the synthesis of the many fold 1,2,3-selenadiazole aromatic derivatives 5a-d. The preparation starts with the reaction between the many fold bromomethylene benzene derivatives 1a-d and 4-hydroxyacetophenone, which are transformed through the reaction with semicarbazide hydrochloride or ethylhydrazine carboxylate into the corresponding semicarbazones derivatives 3a-d or hydrazones 4a-d. The reaction with selenium dioxide leads to regiospecific ring closure of semicarbazones or hydrazones to give the many fold 1,2,3-selenadiazole aromatic derivatives in high yield.

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