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98909-71-8

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98909-71-8 Usage

Check Digit Verification of cas no

The CAS Registry Mumber 98909-71-8 includes 8 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 5 digits, 9,8,9,0 and 9 respectively; the second part has 2 digits, 7 and 1 respectively.
Calculate Digit Verification of CAS Registry Number 98909-71:
(7*9)+(6*8)+(5*9)+(4*0)+(3*9)+(2*7)+(1*1)=198
198 % 10 = 8
So 98909-71-8 is a valid CAS Registry Number.

98909-71-8Downstream Products

98909-71-8Relevant articles and documents

Addition of Aldehydes to Activated Double Bonds, XXXVI. Syntheses and Reactions of 3-Acyl-1,5-dicarbonyl Compounds

Stetter, Hermann,Simons, Leo

, p. 3172 - 3187 (2007/10/02)

Thiazolium salt-catalyzed addition of aldehydes to the 2-methylene-1,4-ketoketals 6-10 and to the unsaturated 2-(alkoxycarbonyl)-1,5-ketoketals 21-24 leads to 3-acyl-1,5-dicarbonyl compounds 30-41.Furthermore, the 4- and 5-(2-oxoalkyl)-2-cyclopenten-1-one

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