134577-52-9 Usage
Check Digit Verification of cas no
The CAS Registry Mumber 134577-52-9 includes 9 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 6 digits, 1,3,4,5,7 and 7 respectively; the second part has 2 digits, 5 and 2 respectively.
Calculate Digit Verification of CAS Registry Number 134577-52:
(8*1)+(7*3)+(6*4)+(5*5)+(4*7)+(3*7)+(2*5)+(1*2)=139
139 % 10 = 9
So 134577-52-9 is a valid CAS Registry Number.
134577-52-9Relevant articles and documents
4-heteryl-β-lactams : A facile synthesis of 1-aryl-4- [isopropylideneamino/methyl-4(3H)-oxoquinazolin-2-yl] azetidin-2-ones
Reddy,Vasantha,Naga Raju
, p. 40 - 44 (2007/10/03)
A facile and efficient synthesis of 4-quinazolinonyl-β-lactams 9 and 10 starting from 2-chloromethylquinazolin-4(3H)-ones 1 is reported.