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91457-71-5

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91457-71-5 Usage

Check Digit Verification of cas no

The CAS Registry Mumber 91457-71-5 includes 8 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 5 digits, 9,1,4,5 and 7 respectively; the second part has 2 digits, 7 and 1 respectively.
Calculate Digit Verification of CAS Registry Number 91457-71:
(7*9)+(6*1)+(5*4)+(4*5)+(3*7)+(2*7)+(1*1)=145
145 % 10 = 5
So 91457-71-5 is a valid CAS Registry Number.

91457-71-5Upstream product

91457-71-5Downstream Products

91457-71-5Relevant articles and documents

New Route to N-Aryl and N-Heteroaryl Derivatives of 4-Hydroxy-3-quinolinecarboxamides

Clemence, Francois,Martret, Odile Le,Collard, Jeannine

, p. 1345 - 1353 (2007/10/02)

The synthesis of N-aryl and N-heteroaryl substituted 4-hydroxy-3-quinolinecarboxamides 1 is described.The attack of dianions 12 of N-aryl substituted acetamides on the C-4 carbonyl of 4H-3,1-benzoxazin-4-ones 11 gave rise to ketoamides 13, which smoothly cyclized in the presence of bases to afford quinolinecarboxamides 1.By this method, a large number of 2-substituted 4-hydroxyquinolinecarboxamides can be prepared.

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