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174519-00-7

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174519-00-7 Usage

Check Digit Verification of cas no

The CAS Registry Mumber 174519-00-7 includes 9 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 6 digits, 1,7,4,5,1 and 9 respectively; the second part has 2 digits, 0 and 0 respectively.
Calculate Digit Verification of CAS Registry Number 174519-00:
(8*1)+(7*7)+(6*4)+(5*5)+(4*1)+(3*9)+(2*0)+(1*0)=137
137 % 10 = 7
So 174519-00-7 is a valid CAS Registry Number.

174519-00-7Relevant articles and documents

A new versatile synthesis of xanthines with variable substituents in the 1-, 3-, 7- and 8-positions

Muller,Sandoval-Ramirez

, p. 1295 - 1299 (1995)

A new convenient procedure for the synthesis of a wide range of xanthines has been developed starting from 3-substituted 6-aminouracils. Nitrosation and reduction yields the corresponding 5,6-diaminouracils, which are condensed with carboxylic acids. The resulting amides can be selectively alkylated at the uracil ring nitrogen N-1 (corresponding to xanthine N-3) under mild conditions. Ring closure and, if desired, alkylation at the 7-position, yields di-, tri-, or tetrasubstituted xanthines in high yields. Sensitive substituents, such as prop-2-ynyl, can be introduced in the 1-position. Variation of the 3-substituent is considerably facilitated in comparison with the standard procedure for the preparation of xanthines.

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