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134221-50-4

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134221-50-4 Usage

Check Digit Verification of cas no

The CAS Registry Mumber 134221-50-4 includes 9 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 6 digits, 1,3,4,2,2 and 1 respectively; the second part has 2 digits, 5 and 0 respectively.
Calculate Digit Verification of CAS Registry Number 134221-50:
(8*1)+(7*3)+(6*4)+(5*2)+(4*2)+(3*1)+(2*5)+(1*0)=84
84 % 10 = 4
So 134221-50-4 is a valid CAS Registry Number.

134221-50-4Relevant articles and documents

Chemo- and regioselective functionalization of uracil derivatives. Applications to the synthesis of oxypurinol and emivirine

Boudet, Nadege,Knochel, Paul

, p. 3737 - 3740 (2006)

A novel route for the synthesis of 4,5-difunctionalized uracils using a chemo- and regioselective bromine/magnesium exchange reaction on 5-bromo-4-halogeno-2,6-dimethoxypyrimidines has been developed. Applications to the synthesis of pharmaceuticals such as oxypurinol and emivirine are reported.

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