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117686-69-8

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117686-69-8 Usage

Check Digit Verification of cas no

The CAS Registry Mumber 117686-69-8 includes 9 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 6 digits, 1,1,7,6,8 and 6 respectively; the second part has 2 digits, 6 and 9 respectively.
Calculate Digit Verification of CAS Registry Number 117686-69:
(8*1)+(7*1)+(6*7)+(5*6)+(4*8)+(3*6)+(2*6)+(1*9)=158
158 % 10 = 8
So 117686-69-8 is a valid CAS Registry Number.

117686-69-8Relevant articles and documents

Durenesulfonic Acid Derivatives as New Condensing Reagents in the Nucleotide Synthesis Following the Triester Method

Losse, Guenter,Stang, Norbert

, p. 19 - 24 (2007/10/02)

As shown by the synthesis of a series of ribonucleotide blocks durenesulfonyl chloride/1-methylimidazole and 1-(3-durenylsulfonyloxy)-6-nitrobenzotriazole (15) are adventageous alternative condensing reagents for the triester method.Hereby the 2'-OH function of the ribose is protected by the 4-methoxybenzyl group, which can be removed suitably by dry TFA/anisole instead of trityl tetrafluoroborate.

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