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212911-11-0

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212911-11-0 Usage

Check Digit Verification of cas no

The CAS Registry Mumber 212911-11-0 includes 9 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 6 digits, 2,1,2,9,1 and 1 respectively; the second part has 2 digits, 1 and 1 respectively.
Calculate Digit Verification of CAS Registry Number 212911-11:
(8*2)+(7*1)+(6*2)+(5*9)+(4*1)+(3*1)+(2*1)+(1*1)=90
90 % 10 = 0
So 212911-11-0 is a valid CAS Registry Number.

212911-11-0Relevant articles and documents

Asymmetric synthesis and antiviral activities of L-carbocyclic 2',3'- didehydro-2',3'-dideoxy and 2',3'-dideoxy nucleosides

Wang, Peiyuan,Gullen, Beth,Newton, M. Gary,Cheng, Yung-Chi,Schinazi, Reymond F.,Chu, Chung K.

, p. 3390 - 3399 (2007/10/03)

Asymmetric syntheses of L-carbocyclic 2',3'-didehydro-2',3'-dideoxy- and 2',3'-dideoxypyrimidine and purine nucleoside analogues were accomplished, and their anti-HIV and anti-HBV activities were evaluated. The key intermediate, (1S,4R)-1-benzoyloxy-4-(tert-butoxymethyl)cyclopent-2-ene (7), was prepared by benzoylation of the alcohol 2, selective deprotection of the isopropylidene group of 3, followed by thermal elimination via cyclic ortho ester or deoxygenation via cyclic thionocarbonate. The target compounds were also synthesized by thermal elimination via cyclic ortho esters from protected nucleosides. It was found that L-carbocyclic 2',3'-didehydro-2',3'- dideoxyadenosine (34) exhibited potent anti-HBV activity (EC50 = 0.9 μM) and moderate anti-HIV activity (EC50 = 2.4 μM) in vitro without cytotoxicity up to 100 μM.

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