156638-75-4 Usage
Check Digit Verification of cas no
The CAS Registry Mumber 156638-75-4 includes 9 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 6 digits, 1,5,6,6,3 and 8 respectively; the second part has 2 digits, 7 and 5 respectively.
Calculate Digit Verification of CAS Registry Number 156638-75:
(8*1)+(7*5)+(6*6)+(5*6)+(4*3)+(3*8)+(2*7)+(1*5)=164
164 % 10 = 4
So 156638-75-4 is a valid CAS Registry Number.
156638-75-4Relevant academic research and scientific papers
Synthesis of aminopyridines from azidopyridines and tetrazolo[1,5-a]pyridines
Mekheimer
, p. 322 - 324 (2007/10/02)
3-Cyano-1,2-dihydro-pyridine-2-ones 2 have been synthesized via the base-catalyzed cycloaddition of arylidenecyanoacetamide 1 with acetophenone. Chlorination of 2 with POCl3/PCl5 mixture gave the corresponding chloropyridines 3. Reac
