81056-77-1 Usage
Check Digit Verification of cas no
The CAS Registry Mumber 81056-77-1 includes 8 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 5 digits, 8,1,0,5 and 6 respectively; the second part has 2 digits, 7 and 7 respectively.
Calculate Digit Verification of CAS Registry Number 81056-77:
(7*8)+(6*1)+(5*0)+(4*5)+(3*6)+(2*7)+(1*7)=121
121 % 10 = 1
So 81056-77-1 is a valid CAS Registry Number.
81056-77-1Relevant academic research and scientific papers
New Preparation of 1-Acylpyridinium Salts
Anders, Ernst,Will, Wolfgang
, p. 390 - 392 (2007/10/02)
1-Acyl-4-alkylidene-1,4-dihydropyridines 1 react with protonic acids like, e. g., tetrafluoroboric or fluorosulfonic acid (2) to give 1-acyl-4-alkylpyridinium salts 3 in nearly quantitative yields.
