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21031-76-5

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21031-76-5 Usage

Check Digit Verification of cas no

The CAS Registry Mumber 21031-76-5 includes 8 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 5 digits, 2,1,0,3 and 1 respectively; the second part has 2 digits, 7 and 6 respectively.
Calculate Digit Verification of CAS Registry Number 21031-76:
(7*2)+(6*1)+(5*0)+(4*3)+(3*1)+(2*7)+(1*6)=55
55 % 10 = 5
So 21031-76-5 is a valid CAS Registry Number.

21031-76-5Downstream Products

21031-76-5Relevant articles and documents

Straightforward pyrimidine ring construction: A versatile tool for the synthesis of nucleobase and nucleoside analogues

Robin, Aelig,Julienne, Karine,Meslin, Jean-Claude,Deniaud, David

, p. 634 - 643 (2007/10/03)

A general route to 1,2,4-trisubstituted pyrimidines is described in one to three steps from a common key precursor, diazadienium iodide 2. An efficient preliminary [4+2] cyclocondensation reaction between the azabutadiene building block 2 and various iso(thio)cyanates constitutes an original construction of the pyrimidine skeleton. Subsequent structural modifications on the heterocycle allow the elaboration of a 1-substituted pyrimidine library that includes nucleoside analogues. Wiley-VCH Verlag GmbH & Co. KGaA, 2006.

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