128942-58-5 Usage
Check Digit Verification of cas no
The CAS Registry Mumber 128942-58-5 includes 9 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 6 digits, 1,2,8,9,4 and 2 respectively; the second part has 2 digits, 5 and 8 respectively.
Calculate Digit Verification of CAS Registry Number 128942-58:
(8*1)+(7*2)+(6*8)+(5*9)+(4*4)+(3*2)+(2*5)+(1*8)=155
155 % 10 = 5
So 128942-58-5 is a valid CAS Registry Number.
128942-58-5Relevant articles and documents
A New Synthesis of 1,2,3,4-Tetrahydro-2-methyl-4-phenylisoquinolines
Venkov, Atanas P.,Vodenicharov, Daniel M.
, p. 253 - 255 (1990)
1,2,3,4-Tetrahydro-2-methyl-4-phenylisoquinolines 6 are obtained from aromatic aldehydes 1, methyl amine and α-haloacetophenones 2 in the presence of sodium borohydride followed by cyclization with sulfuric acid and zinc in methanol.