75998-50-4 Usage
Check Digit Verification of cas no
The CAS Registry Mumber 75998-50-4 includes 8 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 5 digits, 7,5,9,9 and 8 respectively; the second part has 2 digits, 5 and 0 respectively.
Calculate Digit Verification of CAS Registry Number 75998-50:
(7*7)+(6*5)+(5*9)+(4*9)+(3*8)+(2*5)+(1*0)=194
194 % 10 = 4
So 75998-50-4 is a valid CAS Registry Number.
75998-50-4Relevant articles and documents
Heterocycles by Annelation to 4-Pyridinols, III. - 2-Aminopyridothiazin-4-ones
Kuebel, Boerries,Rehling, Herbert
, p. 1402 - 1408 (2007/10/02)
2-Aminopyridothiazin-4-ones 4 are obtained from 4-hydroxy-3-pyidinecarboxylic esters 1 via 4-chloro-3-pyridinecarboxylic esters 2 and reaction of the latter ones with thiourea.The 1,3-thiazin-4-one ring in 4 is very easily cleaved by alkali to
