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1,3-diphenyl-3a-4b-dihydro-4-oxo-3H-benzopyrano<3,4-c>pyrazole-3a-carboxylic acid is a chemical with a specific purpose. Lookchem provides you with multiple data and supplier information of this chemical.

119854-45-4

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119854-45-4 Usage

Check Digit Verification of cas no

The CAS Registry Mumber 119854-45-4 includes 9 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 6 digits, 1,1,9,8,5 and 4 respectively; the second part has 2 digits, 4 and 5 respectively.
Calculate Digit Verification of CAS Registry Number 119854-45:
(8*1)+(7*1)+(6*9)+(5*8)+(4*5)+(3*4)+(2*4)+(1*5)=154
154 % 10 = 4
So 119854-45-4 is a valid CAS Registry Number.

119854-45-4Relevant academic research and scientific papers

REGIOCHEMISTRY OF THE CYCLOADDITIONS OF DIPHENYLNITRILIMINE TO COUMARIN, 3-ETHOXYCARBONYL AND 3-ACETYL COUMARINS. A REINVESTIGATION

Fathi, Toufik,Dinh An, Nguyen,Schmitt, Gerard,Cerutti, Ernest,Laude, Bernard

, p. 4527 - 4536 (2007/10/02)

The cycloaddition reactions of diphenylnitrilimine to coumarin, 3-ethoxycarbonyl and 3-acetylcoumarins were studied.The observed regiochemistry of the reaction with the coumarin 4a was the same as the one suggested by other researchers.For the coumarins 4

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