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16434-52-9

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16434-52-9 Usage

Check Digit Verification of cas no

The CAS Registry Mumber 16434-52-9 includes 8 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 5 digits, 1,6,4,3 and 4 respectively; the second part has 2 digits, 5 and 2 respectively.
Calculate Digit Verification of CAS Registry Number 16434-52:
(7*1)+(6*6)+(5*4)+(4*3)+(3*4)+(2*5)+(1*2)=99
99 % 10 = 9
So 16434-52-9 is a valid CAS Registry Number.

16434-52-9Relevant articles and documents

METHODS AND COMPOSITIONS FOR TREATING HEPATITIS C VIRUS

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Paragraph 0132; 0133, (2017/03/08)

The present invention provides pharmaceutical compositions for the treatment of a hepatitis C infection in a host, comprising an antivirally effective amount of a 2'-C-branched nucleoside or a 2'-C-branched ribofuranosyl nucleoside, or pharmaceutically acceptable salts or esters thereof, in combination with one or more other anti-HCV agent. The present invention further provides the use of a 2'-C-branched nucleoside or a 2'-C-branched ribofuranosyl nucleoside, or pharmaceutically acceptable salts or esters thereof, in the manufacture of a medicament for the treatment of a hepatitis C infection in a host.

A short, flexible route toward 2'-C-branched ribonucleosides

Harry-O'kuru,Smith,Wolfe

, p. 1754 - 1759 (2007/10/03)

A five-step synthesis of 2'-C-branched ribonucleosides from commercially obtained 1,3,5-tri-O-benzoyl-α-D-ribofuranose (4) is described. The free hydroxyl group of 4 was oxidized in high yield with Dess-Martin periodane reagent. The resultant 2-ketosugar was treated with MeMgBr/TiCl4, CH2=CHMgBr/CeCl3, or TMSC≡CLi/CeCl3, and in each case addition to the ketone proceeded stereoselectively to provide 2-alkylated ribofuranosides. After conversion to the corresponding tetrabenzoyl derivatives, the 2-alkylribofuranosides were coupled to nucleobases under Vorbruggen persilylation conditions, giving the β-nucleosides with high stereoselectivity. Deprotection with methanolic ammonia provided the title compounds in 17-49% overall yields from 4.

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