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3-Iodo-7-methoxy-4-(4-methoxy-phenoxy)-chromen-2-one is a chemical with a specific purpose. Lookchem provides you with multiple data and supplier information of this chemical.

128980-55-2

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128980-55-2 Usage

Check Digit Verification of cas no

The CAS Registry Mumber 128980-55-2 includes 9 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 6 digits, 1,2,8,9,8 and 0 respectively; the second part has 2 digits, 5 and 5 respectively.
Calculate Digit Verification of CAS Registry Number 128980-55:
(8*1)+(7*2)+(6*8)+(5*9)+(4*8)+(3*0)+(2*5)+(1*5)=162
162 % 10 = 2
So 128980-55-2 is a valid CAS Registry Number.

128980-55-2Downstream Products

128980-55-2Relevant academic research and scientific papers

A new and efficient synthesis of coumestan and coumestrol

Laschober,Kappe

, p. 387 - 388 (1990)

4-Aryloxy-3-iodocoumarins (4-aryloxy-3-iodo-2H-1-benzopyran-2-one), 4a-c, which are readily available by known procedures starting from 4-hydroxycoumarins 1 a,b and diacetoxyiodobenzenes 2a-c; are cyclized with palladium chloride in triethylamine to yield the coumestanes (6H-benzofuran[3,2-c][1]benzopyran-6-ones) 5a-c.

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