261720-05-2 Usage
Check Digit Verification of cas no
The CAS Registry Mumber 261720-05-2 includes 9 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 6 digits, 2,6,1,7,2 and 0 respectively; the second part has 2 digits, 0 and 5 respectively.
Calculate Digit Verification of CAS Registry Number 261720-05:
(8*2)+(7*6)+(6*1)+(5*7)+(4*2)+(3*0)+(2*0)+(1*5)=112
112 % 10 = 2
So 261720-05-2 is a valid CAS Registry Number.
261720-05-2Relevant articles and documents
all-Z-tribenzo[12]-, tetrabenzo[16]- and pentabenzo[20]annulenes
Kuwatani, Yoshiyuki,Yoshida, Tadahiro,Kusaka, Ayako,Iyoda, Masahiko
, p. 359 - 363 (2007/10/03)
A new synthetic strategy of all-Z-[n]benzo[4n]annulenes, which is based on the intramolecular pinacol coupling, followed by the Corey-Winter procedure, has been developed, and three annulenes have been successfully synthesized using this strategy.
