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67250-03-7

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67250-03-7 Usage

Check Digit Verification of cas no

The CAS Registry Mumber 67250-03-7 includes 8 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 5 digits, 6,7,2,5 and 0 respectively; the second part has 2 digits, 0 and 3 respectively.
Calculate Digit Verification of CAS Registry Number 67250-03:
(7*6)+(6*7)+(5*2)+(4*5)+(3*0)+(2*0)+(1*3)=117
117 % 10 = 7
So 67250-03-7 is a valid CAS Registry Number.

67250-03-7Relevant articles and documents

Thermolysis of Polyazapentadienes. Part 8. The formation of Pyrroles from 1,1-Dialkyl-5-aryl-1,5-diazapentadienes

McNab, Hamish,Murray, M. Elizabeth-Ann

, p. 333 - 338 (2007/10/02)

Flash vacuum pyrolysis of the 1,5-diazapentadienes (4)-(10) gave moderate yields of pyrroles together with quinolines, formed by electrocyclic ring closure with elimination.The pyrroles were formed by hydrogen transfer from an N-alkyl group, followed by cyclisation and final aromatisation of the resulting dihydropyrrole intermediate by free-radical cleavage.The mechanism of the hydrogen transfer and cyclisation is not known with certainty, but may involve diradicals or 1,5-dipolar intermediates.

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