28443-49-4 Usage
Check Digit Verification of cas no
The CAS Registry Mumber 28443-49-4 includes 8 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 5 digits, 2,8,4,4 and 3 respectively; the second part has 2 digits, 4 and 9 respectively.
Calculate Digit Verification of CAS Registry Number 28443-49:
(7*2)+(6*8)+(5*4)+(4*4)+(3*3)+(2*4)+(1*9)=124
124 % 10 = 4
So 28443-49-4 is a valid CAS Registry Number.
28443-49-4Relevant academic research and scientific papers
APPROACH TO THE 1-METHOXY-2-BENZIMIDAZOLINONES
Perronnet, Jacques,Demoute, Jean-Pierre
, p. 507 - 512 (2007/10/02)
With t-butyl hypochlorite the 1-methoxy-3-arylureas are easily converted into the unstable corresponding 1-chloro-1-methoxy-3-arylureas.Cyclization of the latter under basic conditions gives the 1-methoxy-2-benzimidazolinones.The two steps can be carried