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128960-28-1

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128960-28-1 Usage

Check Digit Verification of cas no

The CAS Registry Mumber 128960-28-1 includes 9 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 6 digits, 1,2,8,9,6 and 0 respectively; the second part has 2 digits, 2 and 8 respectively.
Calculate Digit Verification of CAS Registry Number 128960-28:
(8*1)+(7*2)+(6*8)+(5*9)+(4*6)+(3*0)+(2*2)+(1*8)=151
151 % 10 = 1
So 128960-28-1 is a valid CAS Registry Number.

128960-28-1Relevant articles and documents

A Convenient Synthesis of 1,2-Diazepino-quinoxalines via a 1,3-Dipolar Cycloaddition Reaction and Their Tautomeric Structure in a Solution

Kim, Ho Sik,Kurasawa, Yoshihisa,Yoshii, Chiemi,Masuyama, Minako,Takada, Atsushi,Okamoto, Yoshihisa

, p. 2197 - 2202 (2007/10/02)

The reaction of the quinoxaline 4-oxides 7a,b with 2-chloroacrylonitrile resulted in the 1,3-dipolar cycloaddition reaction and further alteration to give the 4-hydroxy-2,3-dihydro-1H-1,2-diazepinoquinoxalines 8a,b and 9a,b, respectively, which were converted into the 4-oxo-2,3,4,6-tetrahydro-1H-1,2-diazepinoquinoxalines 10a,b-12a,b, respectively.The 2,3-dihydro-4-hydroxy form of 9a,b and the 2,3,4,6-trtrahydro-4-oxo form of 10a,b-12a,b were assigned by means of the NOE and 13C-nmr spectral data.

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