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239806-18-9

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239806-18-9 Usage

Check Digit Verification of cas no

The CAS Registry Mumber 239806-18-9 includes 9 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 6 digits, 2,3,9,8,0 and 6 respectively; the second part has 2 digits, 1 and 8 respectively.
Calculate Digit Verification of CAS Registry Number 239806-18:
(8*2)+(7*3)+(6*9)+(5*8)+(4*0)+(3*6)+(2*1)+(1*8)=159
159 % 10 = 9
So 239806-18-9 is a valid CAS Registry Number.

239806-18-9Relevant articles and documents

Reaction of diphenyldiazomethane with N-methyloxy- and N- ethyloxycarbonyl-N-(2,2,2-trichloroethylidene)amines

Jacquot, Sandrine,Belaissaoui, Abdelhak,Schmitt, Gerard,Laude, Bernard,Kubicki, Marek M.,Blacque, Olivier

, p. 1541 - 1544 (1999)

Reaction of the title imines with diphenyldiazomethane gives a Δ3- 1,3,4-triazoline, which leads, after loss of dinitrogen, to a transient azomethine ylide. Subsequent elimination of ethyl or methyl chloroformate gives the unexpected 1,1-diphenyl-4,4-dichloro-2-aza-1,3-butadiene.

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