137345-81-4 Usage
Check Digit Verification of cas no
The CAS Registry Mumber 137345-81-4 includes 9 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 6 digits, 1,3,7,3,4 and 5 respectively; the second part has 2 digits, 8 and 1 respectively.
Calculate Digit Verification of CAS Registry Number 137345-81:
(8*1)+(7*3)+(6*7)+(5*3)+(4*4)+(3*5)+(2*8)+(1*1)=134
134 % 10 = 4
So 137345-81-4 is a valid CAS Registry Number.
137345-81-4Relevant academic research and scientific papers
Ortho-metallation of anthracene derivative: Problem and solution
Matsumoto, Takashi,Kakigi, Hirotoshi,Suzuki, Keisuke
, p. 4337 - 4340 (2007/10/02)
Ortho-metallation of anthracene derivative with alkyllithium is hampered by the preferential attack of the anion to the C(9) and/or C(10) positions. Use of n-BuLi-t-BuOK effected a clean and regioselective metallation at C(2) and subsequent reaction with
