142311-37-3 Usage
Check Digit Verification of cas no
The CAS Registry Mumber 142311-37-3 includes 9 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 6 digits, 1,4,2,3,1 and 1 respectively; the second part has 2 digits, 3 and 7 respectively.
Calculate Digit Verification of CAS Registry Number 142311-37:
(8*1)+(7*4)+(6*2)+(5*3)+(4*1)+(3*1)+(2*3)+(1*7)=83
83 % 10 = 3
So 142311-37-3 is a valid CAS Registry Number.
142311-37-3Relevant articles and documents
1,2-Fused Pyrimidines. V. Synthesis of 1-Alkyl or Phenyl-2H-dipyridopyrimidine-2,5(1H)-diones
Braccio, Mario Di,Roma, Giorgio,Grossi, Gian Carlo,Ciarallo, Giovanni
, p. 25 - 31 (2007/10/02)
The reaction of 2-4H-pyridopyrimidin-4-ones 8a-g with N,N-dimethylformamide/phosphorous oxychloride Vilsmeier reagent 1 (95 deg C, 90 minutes) afforded 1-alkyl or phenyl-2H-dipyridopyrimidine-2,5(1H)
