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80393-99-3

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80393-99-3 Usage

Check Digit Verification of cas no

The CAS Registry Mumber 80393-99-3 includes 8 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 5 digits, 8,0,3,9 and 3 respectively; the second part has 2 digits, 9 and 9 respectively.
Calculate Digit Verification of CAS Registry Number 80393-99:
(7*8)+(6*0)+(5*3)+(4*9)+(3*3)+(2*9)+(1*9)=143
143 % 10 = 3
So 80393-99-3 is a valid CAS Registry Number.

80393-99-3Relevant articles and documents

Propargyl 1,2-orthoesters for a catalytic and stereoselective synthesis of pyrimidine nucleosides

Rao, Boddu Venkateswara,Manmode, Sujit,Hotha, Srinivas

, p. 1499 - 1505 (2015/02/19)

Pyrimidine nucleosides are synthesized by using propargyl 1,2-orthoesters and Au(III) salt as a catalyst. Strategically positioned 1,2-orthoesters are found to yield only 1,2-trans nucleosides and enable preparation of 2′-OH containing pyrimidine nucleosides. The glycosyl donor employed in this study is stable and easily accessible. The identified high-yielding protocol is mild, diastereoselective, and catalytic.

Nucleotides. LXXIV* synthesis of α-D-arabino-oligonucleotides

Henke, Christoph,Pfleiderer, Wolfgang

, p. 1665 - 1706 (2007/10/03)

□ The 5 α-D-arabinofuranosylnucleosides α-araU (15), α-araT (18), α-araC (22), α-araA (25), and α-araG (28) have been synthesized by the modified silyl-method. The amino groups at the nucleobases and the 2′-hydroxy group at the sugar moiety were protected by the 2-(4-nitrophenyl)ethoxycarbonyl (npeoc) group (37-40) and the amide function in α-araG was additionally blocked by the 2-(4-nitrophenyl)ethyl group (63) to improve solubility in organic solvents. Mono-and dimethoxytritylation of the 5′-OH group was performed in the usual manner to give 41-48, 64, and 65 in high yields and further substitution of the 3′-OH group led to the monomeric building blocks 66-75 as well as the 3′-O-succinoyl derivatives 76-85 functioning as starting units in solid-support oligonucleotide synthesis. A large number of oligo-α- arabinonucleotides have been prepared on modified CPG-material applying the npeoc/npe strategy as a very efficient synthetic tool for highly purified, homogenous oligomers. Hybridizations between α-arabinonucleotide strands revealed in analogy to earlier findings an antiparallel orientation whereas the combination of an oligo-α-D-arabinonucleotide with a complementary oligo-2′-deoxy-β-D-ribofuranosylnucleotide showed base-pairing only if a parallel polarity was present. The advantages in oligo-α-arabino- nucleotide synthesis were furthermore demonstrated by the synthesis of the tα-ANAhis a structural analog of the natural tRNAhis of the phage T5. Copyright Taylor & Francis Group, LLC.

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