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94189-81-8

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94189-81-8 Usage

Check Digit Verification of cas no

The CAS Registry Mumber 94189-81-8 includes 8 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 5 digits, 9,4,1,8 and 9 respectively; the second part has 2 digits, 8 and 1 respectively.
Calculate Digit Verification of CAS Registry Number 94189-81:
(7*9)+(6*4)+(5*1)+(4*8)+(3*9)+(2*8)+(1*1)=168
168 % 10 = 8
So 94189-81-8 is a valid CAS Registry Number.

94189-81-8Relevant articles and documents

Design and synthesis of α-carboxy phosphononucleosides

Debarge, Sebastien,Balzarini, Jan,Maguire, Anita R.

, p. 105 - 126 (2011/04/17)

Rhodium catalyzed O-H insertion reactions employing α- diazophosphonate 20 with appropriately protected thymidine, uridine, cytosine, adenosine and guanosine derivatives leads to novel 5′-phosphononucleoside derivatives. Deprotection led to a novel series of phosphono derivatives bearing a carboxylic acid moiety adjacent to the phosphonate group with potential antiviral and/or anticancer activity. The phosphononucleosides bearing an α-carboxylic acid group are envisaged as potential diphosphate mimics. Conversion to mono- and diphosphorylated phosphononucleosides has been effected for evaluation as nucleoside triphosphate mimics. Most of the novel phosphononucleosides proved to be inactive against a variety of DNA and RNA viruses. Only the phosphono AZT derivatives 56-59 showed weak activity against HIV-1 and HIV-2.

One step selective 5′-O-allylation of thymidine using microwave or ultrasound activation

Roy, Vincent,Colombeau, Ludovic,Zerrouki, Rachida,Krausz, Pierre

, p. 1829 - 1831 (2007/10/03)

An improved procedures for the synthesis of 5′-O-allylthymidine via one step selective allylation of thymidine using either ultrasound or microwave activation is described.

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