123420-28-0 Usage
Check Digit Verification of cas no
The CAS Registry Mumber 123420-28-0 includes 9 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 6 digits, 1,2,3,4,2 and 0 respectively; the second part has 2 digits, 2 and 8 respectively.
Calculate Digit Verification of CAS Registry Number 123420-28:
(8*1)+(7*2)+(6*3)+(5*4)+(4*2)+(3*0)+(2*2)+(1*8)=80
80 % 10 = 0
So 123420-28-0 is a valid CAS Registry Number.
123420-28-0Relevant articles and documents
Synthesis of 4-Oxo-3,4-dihydro-1H-thieno- and thienothiadiazine 2,2-Dioxides
Goya, Pilar,Lissavetzky, Jaime,Rozas, Isabel
, p. 280 - 282 (2007/10/02)
4-Oxo-3,4-dihydro-1H-thienothiadiazine 2,2-dioxide (3) has been synthesized in a two-step approach involving sulfamoylation of 3-amino-4-methoxycarbonylthiophene (1) and subsequent ring closure.A modification of this procedure, which involve