74254-83-4 Usage
Check Digit Verification of cas no
The CAS Registry Mumber 74254-83-4 includes 8 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 5 digits, 7,4,2,5 and 4 respectively; the second part has 2 digits, 8 and 3 respectively.
Calculate Digit Verification of CAS Registry Number 74254-83:
(7*7)+(6*4)+(5*2)+(4*5)+(3*4)+(2*8)+(1*3)=134
134 % 10 = 4
So 74254-83-4 is a valid CAS Registry Number.
74254-83-4Relevant articles and documents
A New Route to (+/-) Metoprolol
Gurjar, M.K.,Joshi, Shreerang V,Sastry, B.S.,Rao, A V Rama
, p. 3489 - 3496 (2007/10/02)
Synthesis of 4-(2-methoxyethyl)phenol (5) from phenol is described.The derived aryloxyallyl ether (6) is converted into (+/-)-metoprolol (10) by involving dihydroxylation reaction with OsO4 and NMO.
