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128217-68-5

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128217-68-5 Usage

Check Digit Verification of cas no

The CAS Registry Mumber 128217-68-5 includes 9 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 6 digits, 1,2,8,2,1 and 7 respectively; the second part has 2 digits, 6 and 8 respectively.
Calculate Digit Verification of CAS Registry Number 128217-68:
(8*1)+(7*2)+(6*8)+(5*2)+(4*1)+(3*7)+(2*6)+(1*8)=125
125 % 10 = 5
So 128217-68-5 is a valid CAS Registry Number.

128217-68-5Relevant articles and documents

Synthesis of the Chromophore of Pseudobactin, a Fluorescent Siderophore from Pseudomonas

Kolasa, Teodozyj,Miller, Marvin J.

, p. 4246 - 4255 (2007/10/02)

Protected forms of dihydroxyphenylalanine (DOPA) were converted to the corresponding dihydroquinolin-2-ones 13 by nitration and reductive cyclization.Subsequent N-alkylation with α-halo-γ-aminobutyric acid derivatives provided the carbon framework 12 for the chromophore of pseudobactin.Conversion to protected forms of the fluorescent chromophore 5 was accomplished by reaction of 12 with Lawesson's reagent to produce the corresponding thioamide which was cyclized by reaction with mercuric acetate.

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