20884-50-8 Usage
Check Digit Verification of cas no
The CAS Registry Mumber 20884-50-8 includes 8 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 5 digits, 2,0,8,8 and 4 respectively; the second part has 2 digits, 5 and 0 respectively.
Calculate Digit Verification of CAS Registry Number 20884-50:
(7*2)+(6*0)+(5*8)+(4*8)+(3*4)+(2*5)+(1*0)=108
108 % 10 = 8
So 20884-50-8 is a valid CAS Registry Number.
20884-50-8Relevant articles and documents
α-AMINO KETONES FROM AMINO ACIDS AS PRECURSORS FOR THE KNORR PYRROLE SYNTHESIS
Hamby, James M.,Hodges, John C.
, p. 843 - 850 (2007/10/02)
A useful and versatile modification of the Knorr pyrrole synthesis is described.Key α-amino ketone intermediate for the Knorr condensation were readily prepared from the N-methoxy-N-methylamides of amino acids and condensed with 1,3-dicarbonyl compounds t
