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4-ethyl-2H-1-benzopyran-2-one is a chemical with a specific purpose. Lookchem provides you with multiple data and supplier information of this chemical.

99109-29-2

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99109-29-2 Usage

Check Digit Verification of cas no

The CAS Registry Mumber 99109-29-2 includes 8 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 5 digits, 9,9,1,0 and 9 respectively; the second part has 2 digits, 2 and 9 respectively.
Calculate Digit Verification of CAS Registry Number 99109-29:
(7*9)+(6*9)+(5*1)+(4*0)+(3*9)+(2*2)+(1*9)=162
162 % 10 = 2
So 99109-29-2 is a valid CAS Registry Number.

99109-29-2Relevant academic research and scientific papers

A novel synthesis of coumarins employing triphenyl(α-carboxymethylene)phosphorane imidazolide as a C-2 synthon

Upadhyay, Puspesh K.,Kumar, Pradeep

, p. 236 - 238 (2009)

A novel one-pot synthesis of coumarins via intramolecular Wittig cyclization from the reaction of phenolic compounds containing ortho-carbonyl group and triphenyl(α-carboxymethylene)phosphorane imidazolide is described.

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