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274691-30-4

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274691-30-4 Usage

Check Digit Verification of cas no

The CAS Registry Mumber 274691-30-4 includes 9 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 6 digits, 2,7,4,6,9 and 1 respectively; the second part has 2 digits, 3 and 0 respectively.
Calculate Digit Verification of CAS Registry Number 274691-30:
(8*2)+(7*7)+(6*4)+(5*6)+(4*9)+(3*1)+(2*3)+(1*0)=164
164 % 10 = 4
So 274691-30-4 is a valid CAS Registry Number.

274691-30-4Relevant articles and documents

Synthesis and ring closure reactions of pyrido[3,2,1-jk]carbazol-6-ones[1]

Dang, Hoai V.,Knobloch, Bernd,Habib, Nargues S.,Kappe, Thomas,Stadlbauer, Wolfgang

, p. 85 - 91 (2007/10/03)

4-Hydroxy-5-phenylpyrido[32,1-jk]carbazol-6-ones (4, 5), which were obtained from carbazoles 1 and malonates 2 or 3, were converted to reactive intermediates such as 4-chlorides 9 or 4-tosylates 10, which gave in turn 4-azido-5-phenyl derivatives 11.5-Alkyl-4-azides 11 were not obtained in this manner; however a new one-pot azidation reaction was developed starting from 4-hydroxy derivatives 4 which gave azides 11 in good yields. 4-Azido-5-phenyl derivative 11f cyclized on thermolysis to the indole 12. The thermal behaviour of the azides 11 was studied by thermoanalytical methods (DSC).

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