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124424-31-3

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124424-31-3 Usage

Check Digit Verification of cas no

The CAS Registry Mumber 124424-31-3 includes 9 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 6 digits, 1,2,4,4,2 and 4 respectively; the second part has 2 digits, 3 and 1 respectively.
Calculate Digit Verification of CAS Registry Number 124424-31:
(8*1)+(7*2)+(6*4)+(5*4)+(4*2)+(3*4)+(2*3)+(1*1)=93
93 % 10 = 3
So 124424-31-3 is a valid CAS Registry Number.

124424-31-3Relevant articles and documents

Synthesis of 2',3'-dideoxy-2'-fluoro-3'-thioarabinothymidine and its 3'-phosphoramidite derivative.

Elzagheid, Mohamed I,Tedeschi, Anna Lisa,Damha, Masad J

, p. 1343 - 1346 (2007/10/03)

An efficient method for the synthesis of 5'-O-monomethoxytrityl-2',3'-dideoxy-2'-fluoro-3'-thioarabinothymidine [(5'MMT)araF-T(3'SH), (5)] and its 3'-phosphoramidite derivative (6) suitable for automated incorporation into oligonucleotides, is demonstrated. A key step in the synthesis involves reaction of 5'-O-MMT-2,3'-O-anhydrothymidine (4) (Eleuteri, A.; Reese, C.B.; Song, Q. J. Chem. Soc. Perkin Trans. 1 1996, 2237 pp.) with sodium thioacetate to give (5'-MMT)araF-T(3'SAc) (5) (Elzagheid, M.I.; Mattila, K.; Oivanen, M.; Jones, B.C.N.M.; Cosstick, Loennberg, H. Eur. J. Org. Chem. 2000, 1987-1991). This nucleoside was then converted to its corresponding phosphoramidite derivative, 6, as described previously ((a) Sun, S.; Yoshida, A.; Piccirilli, J.A. RNA, 1997, 3, 1352-1363; (b) Matulic-Adamic, J.; Beigelman, L. Helvetica Chemica Acta 1999, 82, 2141-2150: (c) Fettes, K.J.; O'Neil, I.; Roberts, S.M.; Cosstick, R. Nucleosides, Nucleotides and Nucl. Acids 2001, 20, 1351-1354).

SYNTHESIS OF 2',3'-DISUBSTITUTED 3'-DEOXYTHYMIDINE DERIVATIVES

Herdewijn, P.,Aerschot, A. Van

, p. 943 - 948 (2007/10/02)

Reaction of 2 with DAST followed by detritylation and monomethoxytritylation afforded 34percent of the fluorinated nucleoside 3.This intermediate was used to prepare the 3'-azido-2'-fluoro- and 2',3'-difluoro substituted 5-methyluridine analogues 7 and 11, respectively.

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