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1379595-97-7

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1379595-97-7 Usage

Check Digit Verification of cas no

The CAS Registry Mumber 1379595-97-7 includes 10 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 7 digits, 1,3,7,9,5,9 and 5 respectively; the second part has 2 digits, 9 and 7 respectively.
Calculate Digit Verification of CAS Registry Number 1379595-97:
(9*1)+(8*3)+(7*7)+(6*9)+(5*5)+(4*9)+(3*5)+(2*9)+(1*7)=237
237 % 10 = 7
So 1379595-97-7 is a valid CAS Registry Number.

1379595-97-7Relevant articles and documents

An Efficient Method for the Synthesis of Laquinimod

Huang, Yanyan,Feng, Ying,Gao, Wensheng,Zhang, Chao,Chen, Ligong

, p. 437 - 440 (2016)

Laquinimod, 5-chloro-1,2-dihydro-N-ethyl-4-hydroxy-1-methyl-2-oxo-N- phenyl-3-quinoline carboxamide, is an oral drug in clinical trials for the treatment of multiple sclerosis. An efficient synthetic method for laquinimod from 2-amino-6-chlorobenzoic acid via four steps was established. The overall yield of laquinimod is up to 82% as compared with 70% reported in literature. It has also been demonstrated that green reagent dimethyl carbonate is not suitable for the N-methylation of 5-chloroisatoic anhydride owing to the ring-cleavage reaction induced by the generated methanol. The ring-cleavage by-products were isolated and characterized by 1H-NMR and 13C-NMR. In addition, in the study of laquinimod derivatives, we found that 5-chloro-1,2-dihydro-N-ethyl-4-hydroxy-1-methyl-2-oxo-N-phenyl-3-quinoline carboxamide (laquinimod) was obtained in much higher yield than 7-chloro-1,2-dihydro-N-ethyl-4-hydroxy-1-methyl-2-oxo-N-phenyl-3-quinoline carboxamide under the same reaction conditions, and it is possibly attributed to a neighboring group effect.

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