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23393-73-9

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23393-73-9 Usage

Check Digit Verification of cas no

The CAS Registry Mumber 23393-73-9 includes 8 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 5 digits, 2,3,3,9 and 3 respectively; the second part has 2 digits, 7 and 3 respectively.
Calculate Digit Verification of CAS Registry Number 23393-73:
(7*2)+(6*3)+(5*3)+(4*9)+(3*3)+(2*7)+(1*3)=109
109 % 10 = 9
So 23393-73-9 is a valid CAS Registry Number.

23393-73-9Relevant articles and documents

Nucleosides 9: Design and synthesis of new 8-nitro and 8-amino xanthine nucleosides of expected biological activity

Mohamed, Mosselhi A. N. M.,Abu-Alola, Laila M. B.,Aljaied, Nada M. G.

, p. 745 - 756 (2017/12/26)

The coupling reaction of 1,3-dimethylxanthine (theophylline), 3-benzylxanthine and 3-benzyl-1-methylxanthine with 1-O-acetyl-2,3,5-tri-O-benzoyl-β-D-ribofuranose afforded the corresponding protected nucleosides, respectively. Nitration of each of the theo

An efficient method for the synthesis of β-D-ribonucleosides catalyzed by metal iodides

Mukaiyama, Teruaki,Nagai, Masashi,Matsutani, Takafumi,Shimomura, Naoyuki

, p. 17 - 30 (2007/10/03)

Several β-D-ribonucleosides were synthesized in high yields under mild conditions by N-glycosylations of methyl 2,3,5-tri-O-benzoyl-β-D-ribofuranosyl carbonate (1) with trimethylsilylated nucleoside bases in acetonitrile using a catalytic amount of metal iodide such as SnI2, SbI3 or TeI4. A deprotection of N6-benzoyl group of coupling product took place to a considerable extent when N6-benzoyl-N6,N9-bis(trimethylsilyl)adenine was employed as a nucleoside base using SnI2 or SnCI2 as a catalyst while it was minimized when SbI3 or TeI4 was used. Further, the N-glycosylation of 1 with 7-trimethylsilyltheophylline in the presence of a catalytic amount of metal iodide was more effectively achieved in nitrile solvents other than acetonitrile.

Stereoselective syntheses of β-D-ribonucleosides catalyzed by the combined use of silver salts and diphenyltin sulfide or Lawesson's reagent

Shimomura,Matsutani,Mukaiyama

, p. 3100 - 3106 (2007/10/02)

β-D-Ribonucleosides are stereoselectively synthesized in high yields from methyl 2,3,5-tri-O-benzoyl-β-D-ribofuranosyl carbonate and trimethylsilylated nucleoside bases by the use of [diphenyltin sulfide/silver salt] or [Lawesson's reagent/silver salt] combined catalyst system under mild conditions.

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