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80387-68-4

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80387-68-4 Usage

Check Digit Verification of cas no

The CAS Registry Mumber 80387-68-4 includes 8 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 5 digits, 8,0,3,8 and 7 respectively; the second part has 2 digits, 6 and 8 respectively.
Calculate Digit Verification of CAS Registry Number 80387-68:
(7*8)+(6*0)+(5*3)+(4*8)+(3*7)+(2*6)+(1*8)=144
144 % 10 = 4
So 80387-68-4 is a valid CAS Registry Number.

80387-68-4Relevant articles and documents

New Rearrangements of Arylhydrazones in Polyphosphoric Acid: Extension to the Thiophene and Indole Series. 5

Fusco, Raffaello,Sannicolo, Franco

, p. 1691 - 1696 (1982)

The behavior toward polyphosphoric acid of arylhydrazones of a few heterocyclic carbonyl compounds of the thiophene and indole series is described.The phenylhydrazone and 2,6-dimethylphenylhydrazone of ethyl α-thienylglyoxylate gave ethyl 4- and 5-(4-aminoaryl)-α-thienylglyoxylate, arising from two different sigmatropic rearrangements.The N,3,5-trimethylphenylhydrazone of 2-methylindole-3-carboxaldehyde afforded the 4--2-methylindole-3-carboxaldehyde resulting from a sigmatropic rearrangement, while the 2,6-dimethylphenylhydrazone of the same carbonyl compound unexpectedly gave the 3-(4-amino-3,5-dimethylphenyl)-2-methylindole-3-carboxaldehyde generated through a sigmatropic reaction.Chemical evidences are given for the assigned structures.

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