91680-23-8 Usage
Check Digit Verification of cas no
The CAS Registry Mumber 91680-23-8 includes 8 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 5 digits, 9,1,6,8 and 0 respectively; the second part has 2 digits, 2 and 3 respectively.
Calculate Digit Verification of CAS Registry Number 91680-23:
(7*9)+(6*1)+(5*6)+(4*8)+(3*0)+(2*2)+(1*3)=138
138 % 10 = 8
So 91680-23-8 is a valid CAS Registry Number.
91680-23-8Relevant academic research and scientific papers
Convenient Synthesis of 4-Oxo-tetrahydropyrimidines
Schramm, Siegfried,Schmitz, Ernst,Gruendemann, Egon
, p. 279 - 286 (2007/10/02)
Enamino-nitriles as 6 or 11 yield 4-oxo-pyrimidines (2; 2a; 10; 12a-c) on treatment with cyclohexanone in basic media.Analogous compounds are obtained using acetone, butyraldehyde, benzaldehyde or substituted benzaldehydes.
