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127244-78-4

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127244-78-4 Usage

Check Digit Verification of cas no

The CAS Registry Mumber 127244-78-4 includes 9 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 6 digits, 1,2,7,2,4 and 4 respectively; the second part has 2 digits, 7 and 8 respectively.
Calculate Digit Verification of CAS Registry Number 127244-78:
(8*1)+(7*2)+(6*7)+(5*2)+(4*4)+(3*4)+(2*7)+(1*8)=124
124 % 10 = 4
So 127244-78-4 is a valid CAS Registry Number.

127244-78-4Relevant articles and documents

An Efficient Regioselective Synthesis of Substituted Purine Analogues of Guanosine and Inosine

Raju, Natarajan,Robins, Roland K.,Vaghefi, Morteza M.

, p. 1769 - 1770 (1989)

Condensation of 2-bromo-6-(4-nitrophenylethoxy)purine as the trimethylsilyl derivative (5a) with 1,2,3,5-tetra-O-acetyl-β-D-ribofuranose, 1-O-acetyl-2,3-di-O-benzoyl-5-deoxy-5-diethoxy-phosphinyl-β-D-ribofuranose, and (2-acetoxyethoxy)methyl bromide resulted in N9-regioselective alkylation to give (6a-c), which were then converted to guanine and hypoxanthine nucleosides, nucleotides, and Acyclovir analogues, respectively.

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