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178327-17-8

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178327-17-8 Usage

Check Digit Verification of cas no

The CAS Registry Mumber 178327-17-8 includes 9 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 6 digits, 1,7,8,3,2 and 7 respectively; the second part has 2 digits, 1 and 7 respectively.
Calculate Digit Verification of CAS Registry Number 178327-17:
(8*1)+(7*7)+(6*8)+(5*3)+(4*2)+(3*7)+(2*1)+(1*7)=158
158 % 10 = 8
So 178327-17-8 is a valid CAS Registry Number.

178327-17-8Relevant articles and documents

An efficient, general asymmetric synthesis of carbocyclic nucleosides: Application of an asymmetric aldol/ring-closing metathesis strategy

Crimmins,King,Zuercher,Choy

, p. 8499 - 8509 (2007/10/03)

A general and efficient synthesis of carbocyclic and hexenopyranosyl nucleosides has been developed. The strategy combines three key transformations: an asymmetric aldol addition to establish the relative and absolute configuration of the pseudosugar, a ring-closing metathesis to construct the pseudosugar ring, and a Trost-type palladium(0)-mediated substitution to assemble the pseudosugar and the aromatic base. Carbovir, abacavir, and their 2'-methyl derivatives as well as hexenopyranosyl nucleoside analogues have been prepared by this sequence.

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