23309-31-1 Usage
Check Digit Verification of cas no
The CAS Registry Mumber 23309-31-1 includes 8 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 5 digits, 2,3,3,0 and 9 respectively; the second part has 2 digits, 3 and 1 respectively.
Calculate Digit Verification of CAS Registry Number 23309-31:
(7*2)+(6*3)+(5*3)+(4*0)+(3*9)+(2*3)+(1*1)=81
81 % 10 = 1
So 23309-31-1 is a valid CAS Registry Number.
23309-31-1Relevant articles and documents
Alternative synthesis of dibenzo-and dipyrido-[1,3]diazepines from thioamides and o,o'-diaminobiaryls
Matsuda, Koyo,Yanagisawa, Isao,Isomura, Yasuo,Mase, Toshiyasu,Shibanuma, Tadao
, p. 2393 - 2402 (2007/10/03)
Thioamides were treated with iodomethane, and then o,o'-diaminobiphenyl or bipyridyl to afford 6-substituted-5H-dibenzo- or dipyrido [1,3]diazepines in good yields.
