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74845-00-4

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74845-00-4 Usage

Check Digit Verification of cas no

The CAS Registry Mumber 74845-00-4 includes 8 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 5 digits, 7,4,8,4 and 5 respectively; the second part has 2 digits, 0 and 0 respectively.
Calculate Digit Verification of CAS Registry Number 74845-00:
(7*7)+(6*4)+(5*8)+(4*4)+(3*5)+(2*0)+(1*0)=144
144 % 10 = 4
So 74845-00-4 is a valid CAS Registry Number.

74845-00-4Relevant articles and documents

PREPARATION OF CINNOLINE-3,4-DICARBONITRILE AND -DICARBOXYLIC ACID

Ames, D. E.,Bull, D.

, p. 2489 - 2492 (2007/10/02)

Attempts to prepare cinnoline-3,4-dicarboxylic acid from 3,4-dimethylcinnoline failed owing to the unreactivity of the 3-Me group.Successive treatment of 3-bromo-4-chlorocinnoline with sodium toluene-p-sulphinate and potassium cyanide in dimethylformamide (DMF) gave 4-toluene-p-sulphonylcinnoline-3-carbonitrile and then cinnoline-3,4-dicarbonitrile (82percent).Hydrolysis yielded cinnoline-3,4-dicarboxylic acid (53percent).Cinnoline-3,4-dicarbonitrile undergoes nucleophylic displacement of either the 4- or the 3-cyano group by ammonia or amine to give 4-amino- and 4-benzylaminocinnoline-3-carbonitrile but 3-dimethylamino-cinnoline-4-carbonitrile.

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