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121231-93-4

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121231-93-4 Usage

Check Digit Verification of cas no

The CAS Registry Mumber 121231-93-4 includes 9 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 6 digits, 1,2,1,2,3 and 1 respectively; the second part has 2 digits, 9 and 3 respectively.
Calculate Digit Verification of CAS Registry Number 121231-93:
(8*1)+(7*2)+(6*1)+(5*2)+(4*3)+(3*1)+(2*9)+(1*3)=74
74 % 10 = 4
So 121231-93-4 is a valid CAS Registry Number.

121231-93-4Relevant articles and documents

Deoxygenative [1,2]-hydride shift rearrangements in nucleoside and sugar chemistry: Analogy with the [1,2]-electron shift in the deoxygenation of ribonucleotides by ribonucleotide reductases

Robins, Morris J.,Nowak, Ireneusz,Wnuk, Stanislaw F.,Hansske, Fritz,Madej, Danuta

, p. 8216 - 8221 (2008/03/15)

(Chemical Equation Presented) A variant of the semipinacol rearrangement that was observed in our laboratory has been applied to the synthesis of several furanose and pyranose derivatives. The process consists of an "orchestrated" [1,2]-hydride shift with

122. Xylose-DNA containing the four natural bases

Seela, Frank,Heckel, Maximilian,Rosemeyer, Helmut

, p. 1451 - 1461 (2007/10/03)

Oligonucleotides containing (′-deoxy-β-D-xylofuranosyl)guanine have been prepared. For this purpose 2-aminoadenosine (5) was synthesized and converted to 2′-deoxy-β-D-xyloguanosine (1) The related 2′-deoxy-β-D-xyloisoguanosine (3) and 2′-deoxy-β-D-xyloxan

Synthesis and anti-HIV activity of different sugar-modified pyrimidine and purine nucleosides

Herdewijn,Balzarini,Baba,Pauwels,Van Aerschot,Janssen,De Clerq

, p. 2040 - 2048 (2007/10/02)

A series of base-modified pyrimidine 3'-azido-2',3'-dideoxynucleosides and 3'-substituted purine and pyrimidine 2',3'-dideoxynucleosides have been synthesized and evaluated for their inhibitory activity against human immunodeficiency virus (HIV) replication in MT-4 cells. The following pyrimidine derivatives emerged as the most potent and/or selective inhibitors of HIV-induced cytopathogenicity (in order of decreasing selectivity: 3'-azido-3'-deoxythymidine (AZT), 3'-azido-2',3'-dideoxyuridine (AzddUrd), 3'-azido-2',3'-dideoxy-5-methylcytidine (AzddMeCyd), 3'-fluoro-ddUrd (FddUrd), 3'-fluoro-ddThd (FddThd), the N4-hydroxylated derivative of AzddMeCyd and the N4-methylated derivative of AzddMeCyd. Among the purine 2',3'-dideoxynucleosides, 3'-azido-2',3'-dideoxyguanosine (AzddGuo), 3'-fluoro-ddGuo (FddGuo), and 3'-fluoro-2,6-diaminopurine 2',3'-dideoxynucleoside (FddDAPR) were the most selective inhibitors of HIV replication.

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