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492470-94-7

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492470-94-7 Usage

Check Digit Verification of cas no

The CAS Registry Mumber 492470-94-7 includes 9 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 6 digits, 4,9,2,4,7 and 0 respectively; the second part has 2 digits, 9 and 4 respectively.
Calculate Digit Verification of CAS Registry Number 492470-94:
(8*4)+(7*9)+(6*2)+(5*4)+(4*7)+(3*0)+(2*9)+(1*4)=177
177 % 10 = 7
So 492470-94-7 is a valid CAS Registry Number.

492470-94-7Relevant articles and documents

Facile synthesis of substituted 4-hydroxy coumarinobenzothiophenes

Kumar, P. Naveen,Prasanna,Chandramouli

, p. 271 - 276 (2001)

The Lewis acid in dichloromethane mediated cyclization and demethylation of substituted 2-aryl-2-((2-methoxy phenvl)thio)acetophenones 3a-f at room temperature converting into 7-hydroxy-2,3-diaryl substituted benzothiophenes 4a-f.These were condenced with substituted malonic acids by the same reagent to produce the substituted 4-hydroxy coumarino benzothiophenes (6a-f & 7a-f).

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