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774235-34-6

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774235-34-6 Usage

Check Digit Verification of cas no

The CAS Registry Mumber 774235-34-6 includes 9 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 6 digits, 7,7,4,2,3 and 5 respectively; the second part has 2 digits, 3 and 4 respectively.
Calculate Digit Verification of CAS Registry Number 774235-34:
(8*7)+(7*7)+(6*4)+(5*2)+(4*3)+(3*5)+(2*3)+(1*4)=176
176 % 10 = 6
So 774235-34-6 is a valid CAS Registry Number.

774235-34-6Relevant articles and documents

The synthesis of [(β-D-ribofuranosyloxy)-methyl]nucleosides

Mereyala, Hari Babu,Mamidyala, Sreeman Kumar

, p. 655 - 669 (2007/10/03)

The coupling reaction of acetoxymethoxy ribofuranoside 4 with nucleic acid bases 5a-f to synthesize novel (ribofuranosyloxy)methyl uracil, thymine, cytosine, adenine, guanine derivatives 6a-g respectively in preference to the expected formation of natural nucleosides 2′,3′,5′ -tri-O-benzoyl uridine, methyluridine, cytidine, adenosine and guanosine 7a-g is described. Detailed study of these reactions catalysed by Lewis acids TMSOTf and SnCl4 is described. TMSOTf exhibited selectivity for the formation of ribofuranosyloxy methyl derivatives 6a-g rather than 7a-g. Reason for formation of 6a-g is explained by HSAB principle.

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