1403659-57-3 Usage
Check Digit Verification of cas no
The CAS Registry Mumber 1403659-57-3 includes 10 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 7 digits, 1,4,0,3,6,5 and 9 respectively; the second part has 2 digits, 5 and 7 respectively.
Calculate Digit Verification of CAS Registry Number 1403659-57:
(9*1)+(8*4)+(7*0)+(6*3)+(5*6)+(4*5)+(3*9)+(2*5)+(1*7)=153
153 % 10 = 3
So 1403659-57-3 is a valid CAS Registry Number.
1403659-57-3Relevant articles and documents
Direct halogenation reactions in 2,3-dihydro-4(1H)-quinazolinones
Cabrera-Rivera, Fanny A.,Ortiz-Nava, Claudia,Roman-Bravo, Perla,Escalante, Jaime,Leyva, Marco A.
, p. 2173 - 2195,23 (2020/08/31)
Reaction of 2,3-dihydro-4(1H)-quinazolinones with NBS, Br 2/Et3N and NCS yields 6,8-Br/Cl-2,3-dihydro-4(1H)- quinazolinones with moderate to good yield. The method does not require a catalyst and offers extremely short reaction time.
