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71267-77-1

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71267-77-1 Usage

Check Digit Verification of cas no

The CAS Registry Mumber 71267-77-1 includes 8 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 5 digits, 7,1,2,6 and 7 respectively; the second part has 2 digits, 7 and 7 respectively.
Calculate Digit Verification of CAS Registry Number 71267-77:
(7*7)+(6*1)+(5*2)+(4*6)+(3*7)+(2*7)+(1*7)=131
131 % 10 = 1
So 71267-77-1 is a valid CAS Registry Number.

71267-77-1Relevant articles and documents

Quinolizines and Indolizines, XIII. Acyl-2-hydroxy-4-quinolizinones

Kappe, Thomas,Linnau, Yendra

, p. 349 - 358 (2007/10/02)

The reaction of 2-picolylketones (1a, b) with reactive trichlorophenyl malonates (2a-f) leads to 1-acyl-2-hydroxy-4-quinolizinones (3a-i) which can be easily deacylated by boiling hydrochloric acid yielding 4-quinolizinones 4a-f.The 3-acetyl-2-hydroxy-4-quinolizinones 6 and 8 are obtained by Klosa-Ziegler acylation of 4a and 7, respectively.The reaction of the acetyl compound 3a with acetic anhydride yields the 2-pyrone derivative 9, whereas the propionyl derivative 3g yields the 4-pyrone 10 under the same conditions.Nitration of 3e does not give the 1-nitro derivative 12 but rather the 1,3-dinitro compound 11. - Keywords: 3-Acetyl-2-hydroxy-4-quinolizinones; 1-Acyl-2-hydroxy-4-quinolizinones; Bis-2,4,6-trichlorophenyl malonates; Deacylation; Klosa-Ziegler-acylation

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