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177949-64-3

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177949-64-3 Usage

Check Digit Verification of cas no

The CAS Registry Mumber 177949-64-3 includes 9 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 6 digits, 1,7,7,9,4 and 9 respectively; the second part has 2 digits, 6 and 4 respectively.
Calculate Digit Verification of CAS Registry Number 177949-64:
(8*1)+(7*7)+(6*7)+(5*9)+(4*4)+(3*9)+(2*6)+(1*4)=203
203 % 10 = 3
So 177949-64-3 is a valid CAS Registry Number.

177949-64-3Downstream Products

177949-64-3Relevant articles and documents

Transformations of thiopyrimidine and thiopurine nucleosides following oxidation with dimethyldioxirane

Saladino, Raffaele,Mincione, Enrico,Crestini, Claudia,Mezzetti, Maurizio

, p. 6759 - 6780 (1996)

A general and convenient method for the synthesis of several pyrimidine and purine nucleosides by selective oxidation of thionucleosides with dimethyldioxirane is reported. Thioketo moieties in the C-4 position of the pyrimidine ring, and in the C-6, and C-8 positions of the purine ring are the domain of oxidative nucleophilic substitution. Thioketo moieties in the C-2 position of both purine and pyrimidine rings are the domain of desulfurization or formation of disulfides.

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