211491-09-7 Usage
Check Digit Verification of cas no
The CAS Registry Mumber 211491-09-7 includes 9 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 6 digits, 2,1,1,4,9 and 1 respectively; the second part has 2 digits, 0 and 9 respectively.
Calculate Digit Verification of CAS Registry Number 211491-09:
(8*2)+(7*1)+(6*1)+(5*4)+(4*9)+(3*1)+(2*0)+(1*9)=97
97 % 10 = 7
So 211491-09-7 is a valid CAS Registry Number.
211491-09-7Relevant articles and documents
Thermal radical cyclization of non-conjugated aromatic enyne-allenes: Synthesis of a cyclobuta[a]naphthalene skeleton
Ikemoto, Chie,Kawano, Tomikazu,Ueda, Ikuo
, p. 5053 - 5056 (1998)
The thermal cyclization of non-conjugated aromatic enyne-allenes (2) to form benzobicyclo [4.2.0]octatrienol (3) provides a simple and convenient procedure of the preparation of a cyclobuta[a]-naphthalene skeleton (4).
