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289891-54-9

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289891-54-9 Usage

Check Digit Verification of cas no

The CAS Registry Mumber 289891-54-9 includes 9 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 6 digits, 2,8,9,8,9 and 1 respectively; the second part has 2 digits, 5 and 4 respectively.
Calculate Digit Verification of CAS Registry Number 289891-54:
(8*2)+(7*8)+(6*9)+(5*8)+(4*9)+(3*1)+(2*5)+(1*4)=219
219 % 10 = 9
So 289891-54-9 is a valid CAS Registry Number.

289891-54-9Downstream Products

289891-54-9Relevant articles and documents

Synthesis of 5'-C- and 2'-O-(bromoalkyl)-substituted ribonucleoside phosphoramidites for the post-synthetic functionalization of oligonucleotides on solid support

Wu, Xiaolin,Pitsch, Stefan

, p. 1127 - 1144 (2007/10/03)

The preparation of building blocks for the incorporation of 6'-O-(5- bromopentyl)-substituted β-D-allofuranosylnucleosides and 2'-O-[(3- bromopropoxy)methyl]-substituted ribonucleosides into oligonucleotide sequences is presented (Schemes 1 and 2). These reactive building blocks can be modified with a variety of soft nucleophiles while the (fully protected) sequence is still attached to the solid support. As an example of this strategy, we carried out some preliminary solid-phase substitution and conjugation reactions with DNA sequences containing a 2'-O-[(3- bromopropoxy)methyl]-substituted ribonucleoside (Scheme 3) and determined the pairing properties of duplexes obtained therefrom.

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