59021-50-0 Usage
Check Digit Verification of cas no
The CAS Registry Mumber 59021-50-0 includes 8 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 5 digits, 5,9,0,2 and 1 respectively; the second part has 2 digits, 5 and 0 respectively.
Calculate Digit Verification of CAS Registry Number 59021-50:
(7*5)+(6*9)+(5*0)+(4*2)+(3*1)+(2*5)+(1*0)=110
110 % 10 = 0
So 59021-50-0 is a valid CAS Registry Number.
59021-50-0Relevant articles and documents
On the Synthesis of 3-amino-pyrroles by Thorpe-Ziegler-Cyclization
Gewald, K.,Schaefer, H.,Bellmann, P.,Hain, U.
, p. 491 - 496 (2007/10/02)
N-Aryl and alkylaminomethylene cyanacetic acid derivatives 1 react with α-halogencarbonyl compounds 2 in the presence of potassium carbonate/sodium ethoxide to yield the substituted 3-amino-pyrroles 6.Using the same principle of cyclization pyrrole deriva