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439579-45-0

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439579-45-0 Usage

Check Digit Verification of cas no

The CAS Registry Mumber 439579-45-0 includes 9 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 6 digits, 4,3,9,5,7 and 9 respectively; the second part has 2 digits, 4 and 5 respectively.
Calculate Digit Verification of CAS Registry Number 439579-45:
(8*4)+(7*3)+(6*9)+(5*5)+(4*7)+(3*9)+(2*4)+(1*5)=200
200 % 10 = 0
So 439579-45-0 is a valid CAS Registry Number.

439579-45-0Relevant articles and documents

Tetrazoles: XLIV. Synthesis and chemical properties of 5-substituted 2-triphenylmethyltetrazoles

Myznikov,Artamonova,Bel'skii,Stash,Skvortsov,Koldobskii

, p. 1360 - 1369 (2002)

Tritylation of tetrazole and its 5-substituted derivatives with triphenylmethyl chloride under conditions of phase-transfer catalysis regioselectively yields the corresponding 5-substituted 2-trityltetrazoles which can be used to protect N-H bonds in nitrogen-containing heterocycles and O-H bonds in primary alcohols. Thermolysis of 2-trityltetrazoles in benzonitrile leads to 3,6-disubstituted 1,2,4,5-tetrazines. Thermal transformation of the same compounds in dodecane follows a radically different mechanism, resulting in formation of difficultly accessible 8,8-diphenylheptafulvenes. The structure of the latter was proved by X-ray analysis.

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