148256-84-2 Usage
Check Digit Verification of cas no
The CAS Registry Mumber 148256-84-2 includes 9 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 6 digits, 1,4,8,2,5 and 6 respectively; the second part has 2 digits, 8 and 4 respectively.
Calculate Digit Verification of CAS Registry Number 148256-84:
(8*1)+(7*4)+(6*8)+(5*2)+(4*5)+(3*6)+(2*8)+(1*4)=152
152 % 10 = 2
So 148256-84-2 is a valid CAS Registry Number.
148256-84-2Relevant articles and documents
Metelation of diazines VIII metalation of 4-chloropyrimidine derivatives new synthesis of trimethoprim
Ple,Turck,Martin,Barbey,Queguiner
, p. 1605 - 1608 (1993)
A new synthesis of trimethoprim is described, metalation of a pyrimidine has been used in the key step. An exceptional regioselectivity in the metalation of pyrimidine derivatives has been highlighted.