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242481-20-5

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242481-20-5 Usage

Check Digit Verification of cas no

The CAS Registry Mumber 242481-20-5 includes 9 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 6 digits, 2,4,2,4,8 and 1 respectively; the second part has 2 digits, 2 and 0 respectively.
Calculate Digit Verification of CAS Registry Number 242481-20:
(8*2)+(7*4)+(6*2)+(5*4)+(4*8)+(3*1)+(2*2)+(1*0)=115
115 % 10 = 5
So 242481-20-5 is a valid CAS Registry Number.

242481-20-5Downstream Products

242481-20-5Relevant articles and documents

Utility of 2-amino-4,5,6,8-tetrahydro-7H-chromene-3-carbonitriles in synthesis of chromeno[2,3-d]pyrimidine and chromeno[3,2-e] [1,2,4]triazolo[1,5-c]pyrimidine derivatives of pharmaceutical interest

Hassanien,Zahran,El-Gaby,Ghorab

, p. 350 - 354 (2007/10/03)

Chromeno[2,3-d]pyrimidines (5, 6 and 8) have been prepared by the reaction of 2-amino-7,7-dimethyl-4-substitutedphenyl-5-oxo-4,5,6,8-tetrahydro-7H-chromene-3- carbonitriles (2a,b) with formic acid, form amide and phenyl isothiocyanate respectively. The reaction of 3-amino-4-iminochromeno[2,3-d]pyrimidine (11) with formic acid, acetic anhydride and p-chlorobenzaldehyde have furnished the chromeno[3,2-e][1,2,4]triazolo[1,5-c]pyrimidines (12, 14 and 15) respectively.

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