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139722-36-4

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139722-36-4 Usage

Check Digit Verification of cas no

The CAS Registry Mumber 139722-36-4 includes 9 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 6 digits, 1,3,9,7,2 and 2 respectively; the second part has 2 digits, 3 and 6 respectively.
Calculate Digit Verification of CAS Registry Number 139722-36:
(8*1)+(7*3)+(6*9)+(5*7)+(4*2)+(3*2)+(2*3)+(1*6)=144
144 % 10 = 4
So 139722-36-4 is a valid CAS Registry Number.

139722-36-4Downstream Products

139722-36-4Relevant articles and documents

Formation of 1,2-Dihydroquinazolin-4(3H)-ones. Reinvestigation of a Recently Reported 1,3,4-Benzotriazepine Synthesis

Fueloep, Ferenc,Simeonov, Mario,Pihlaja, Kalevi

, p. 531 - 538 (2007/10/02)

A recent paper (Bull.Chem.Soc.Jpn. 59, 1575/1986/) reported that the reactions of o-aminobenzoylhydrazine with benzylideneanilines lead to the formation of 1,3,4-benzotriazepin-5-one or 1-(o-benzylideneaminobenzoyl)-2-benzylidenehydrazines, depending on the substituents used.This is shown by the present paper to be incorrect.Depending on the proportions of the reagents, the above reactions lead to 1-(o-aminobenzoyl)-2-benzylidenehydrazines (7) or 2-aryl-3-benzylideneamino-1,2-dihydroquinazolin-4(3H)-ones (8).

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