121998-51-4 Usage
Check Digit Verification of cas no
The CAS Registry Mumber 121998-51-4 includes 9 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 6 digits, 1,2,1,9,9 and 8 respectively; the second part has 2 digits, 5 and 1 respectively.
Calculate Digit Verification of CAS Registry Number 121998-51:
(8*1)+(7*2)+(6*1)+(5*9)+(4*9)+(3*8)+(2*5)+(1*1)=144
144 % 10 = 4
So 121998-51-4 is a valid CAS Registry Number.
121998-51-4Relevant articles and documents
A Facile Synthesis of 2,4,8,10-Tetrahalo-6,12-diaryldibenzodiazocines
Boruah, R. C.,Sandhu, J. S.
, p. 459 - 462 (2007/10/02)
3,5-Dihalo-2-aminobenzophenones 2 on prolonged reflux in dry pyridine gave 2,4,8,10-tetrahalo-6,12-diaryldibenzodiazocines 3 in high yields.Attempted condensation of 2 with glycine ester hydrochloride under identical reaction conditions failed to afford 1,4-benzodiazepines.
