23421-50-3 Usage
Check Digit Verification of cas no
The CAS Registry Mumber 23421-50-3 includes 8 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 5 digits, 2,3,4,2 and 1 respectively; the second part has 2 digits, 5 and 0 respectively.
Calculate Digit Verification of CAS Registry Number 23421-50:
(7*2)+(6*3)+(5*4)+(4*2)+(3*1)+(2*5)+(1*0)=73
73 % 10 = 3
So 23421-50-3 is a valid CAS Registry Number.
23421-50-3Relevant articles and documents
Synthesis of fluorene- and spirobifluorene-fused thiophenes
Yao, Wen,Liu, Qiancai,Shi, Yingbo,Tang, Jie
, p. 1077 - 1088 (2012)
A novel synthetic route to fluorene- and spirobifluorene-fused thiophenes is explored by starting with ninhydrin. The Diels-Alder cycloaddition was employed to construct the key intermediate, 2,3-bis(hydroxymethyl)-1,4-diphenyl- fluorenone, which was furt
