136866-42-7 Usage
Check Digit Verification of cas no
The CAS Registry Mumber 136866-42-7 includes 9 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 6 digits, 1,3,6,8,6 and 6 respectively; the second part has 2 digits, 4 and 2 respectively.
Calculate Digit Verification of CAS Registry Number 136866-42:
(8*1)+(7*3)+(6*6)+(5*8)+(4*6)+(3*6)+(2*4)+(1*2)=157
157 % 10 = 7
So 136866-42-7 is a valid CAS Registry Number.
136866-42-7Relevant articles and documents
Metalation of diazines IV. Lithiation of sym-disubstituted pyrazines
Turck, A.,Trohay, D.,Mojovic, L.,Ple, N.,Queguiner, G
, p. 301 - 310 (2007/10/02)
Conditions for the metalation of 2,6-dichloro- and 2-6-dimethoxy-pyrazine are defined and the lithio-derivatives are shown to react with some electrophiles.A convenient synthesis of a diazaxanthone from the lithio-derivative of the dichloro-compund is des
