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23028-24-2

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23028-24-2 Usage

Check Digit Verification of cas no

The CAS Registry Mumber 23028-24-2 includes 8 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 5 digits, 2,3,0,2 and 8 respectively; the second part has 2 digits, 2 and 4 respectively.
Calculate Digit Verification of CAS Registry Number 23028-24:
(7*2)+(6*3)+(5*0)+(4*2)+(3*8)+(2*2)+(1*4)=72
72 % 10 = 2
So 23028-24-2 is a valid CAS Registry Number.

23028-24-2Relevant articles and documents

Synthesis of substituted coumarins via Bronsted acid mediated condensation of allenes with substituted phenols or anisoles

Kim, Sundae,Kang, Dongjin,Lee, Chang-Hee,Lee, Phil Ho

experimental part, p. 6530 - 6537 (2012/10/08)

Coumarins were obtained from the condensation of electron-rich arenes with allenes in the presence of TfOH in good yield. Depending on the substituent pattern of allenes employed, the general synthetic method of 4-substituted and 3,4-disubstituted 3-arylc

A Novel and Conveneint Synthesis of 3-Phenylcoumarins

Rao, P., Pulla,Srimannaryana, G.

, p. 887 - 888 (2007/10/02)

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