335159-81-4 Usage
Check Digit Verification of cas no
The CAS Registry Mumber 335159-81-4 includes 9 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 6 digits, 3,3,5,1,5 and 9 respectively; the second part has 2 digits, 8 and 1 respectively.
Calculate Digit Verification of CAS Registry Number 335159-81:
(8*3)+(7*3)+(6*5)+(5*1)+(4*5)+(3*9)+(2*8)+(1*1)=144
144 % 10 = 4
So 335159-81-4 is a valid CAS Registry Number.
335159-81-4Relevant academic research and scientific papers
Synthesis of thieno[2,3-b]quinoxalines from 2-haloquinoxalines
Armengol, Montserrat,Joule, John A.
, p. 154 - 158 (2007/10/03)
Thieno[2,3-b]quinoxalines were synthesized from 2-haloquinoxalines using palladium catalyst. The coupling of latter with alkynes and addition of one mol equivalent of bromine to the 2-alkynylquinoxalines thus produced was described. The resulting dibromid
