90331-29-6 Usage
Check Digit Verification of cas no
The CAS Registry Mumber 90331-29-6 includes 8 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 5 digits, 9,0,3,3 and 1 respectively; the second part has 2 digits, 2 and 9 respectively.
Calculate Digit Verification of CAS Registry Number 90331-29:
(7*9)+(6*0)+(5*3)+(4*3)+(3*1)+(2*2)+(1*9)=106
106 % 10 = 6
So 90331-29-6 is a valid CAS Registry Number.
90331-29-6Relevant articles and documents
N-Alkylations of Unsymmetric Piperazines
Chung, Byung-Ho,Zymalkowski, Felix
, p. 323 - 329 (2007/10/02)
Unsymmetrically 1,4-disubstituted piperazines can be N-(or N'-)mono- or N,N'-bisalkylated.If the two substituents differ in size sufficiently, monoalkylations occur regiospecifically.
