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171776-89-9

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171776-89-9 Usage

Check Digit Verification of cas no

The CAS Registry Mumber 171776-89-9 includes 9 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 6 digits, 1,7,1,7,7 and 6 respectively; the second part has 2 digits, 8 and 9 respectively.
Calculate Digit Verification of CAS Registry Number 171776-89:
(8*1)+(7*7)+(6*1)+(5*7)+(4*7)+(3*6)+(2*8)+(1*9)=169
169 % 10 = 9
So 171776-89-9 is a valid CAS Registry Number.

171776-89-9Downstream Products

171776-89-9Relevant articles and documents

Synthesis of tricyclic quinolones and naphthyridones by intramolecular heck cyclization of functionalized electron-rich heterocycles

Beccalli, Egle M.,Broggini, Gianluigi,Martinelli, Michela,Paladino, Giuseppe,Zoni, Caterina

, p. 2091 - 2096 (2007/10/03)

Starting from commercially available pyrrole- and thiophene-2-carboxylic acids 1 or thiophene- and furan-3-carboxylic acids 6, we report the synthesis of tricyclic fused quinolone and naphthyridone derivatives, in only three steps, by an intramolecular He

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