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671779-86-5

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671779-86-5 Usage

Check Digit Verification of cas no

The CAS Registry Mumber 671779-86-5 includes 9 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 6 digits, 6,7,1,7,7 and 9 respectively; the second part has 2 digits, 8 and 6 respectively.
Calculate Digit Verification of CAS Registry Number 671779-86:
(8*6)+(7*7)+(6*1)+(5*7)+(4*7)+(3*9)+(2*8)+(1*6)=215
215 % 10 = 5
So 671779-86-5 is a valid CAS Registry Number.

671779-86-5Relevant articles and documents

Effective syntheses of quinoline-7,8-diol, 5-amino-L-DOPA, and 3-(7,8-dihydroxyquinolin-5-yl)-L-alanine

Heinrich, Markus R.,Steglich, Wolfgang

, p. 9231 - 9237 (2003)

A modification of the Baeyer-Villiger reaction allows the conversion of aromatic 2-hydroxy-3-nitroketones and aldehydes into 3-nitrocatechols, which can be reduced to 3-aminocatechols. Reaction of the latter with acrolein yields quinoline-7,8-diols under exceptionally mild conditions. This new reaction sequence was successfully applied to the synthesis of the title compounds.

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