enantioresolution of amphetamine, metamphetamine, and deprenyl ( selegiline) by lc, gc, and ce...
DESCRIPTION
Enantiomer ? - Sterioisomer - Isomer are two or more compounds with the same molecular composition but different Structures result in different properties Example of structural isomer (a) butane and (b) isobutaneTRANSCRIPT
Enantioresolution of Amphetamine, Metamphetamine, and Deprenyl
( Selegiline) by LC, GC, and CE
การแยก enantiomeric (R, S, (+), (-) form) ของ amphetamine,methamphetamine,และ selegiline ด้วยวธิ ี LC, GC และ CE
นำาเสนอโดย
น.ส. อรทัย กฤษณานุวฒัน์ รหัสนักศึกษา 51312336
จุดประสงค์ของงานวจิยั
• Enantiomer ? - Sterioisomer - Isomer are two or more compounds with the same molecular composition but differentStructures result in different properties
Example of structural isomer (a) butane and (b) isobutane
*Stereoisomers describes compounds with the same Molecular formula and chemical structure but the atom are orientated in different direction. *There are two isomer each a mirror image of the other call enantiomers
These two molecules are stereoisomer or enantiomer
*The mean of d-,l-, (+) , (-) ,R- and S- - if an isomer rotates the plane clockwise label (+) termed d - its counter is label (-) termed l
Structures of enantiomers of amphetamine and methamphetamine
l-Methamphetamine
HCH3NH
CH3
l-Amphetamine
H2N
CH3
H
d-Amphetamine
NH2
CH3
H
d-Methamphetamine
H NHCH3
CH3
* Amphetamine , methamphetamine and selegiline are chiral compound
* The legimate uses of amphetamine and methamphetamine hyperactivity and treatment of exogenous obesity* The rapid and effective enantioresolution is important for pharmacological, toxicological, forensic studies and product quality control* Capillary electrophoresis (CE) may be the best for the rapid analysis of small amounts of pure compound* Greater sensitivity and reproducibility of GC or LC may be needed when analyzing low levels of a compound
*Materials And Method - LC and CE Fisher Scientific - LC Cyclobond 2000 LC column Cyclobond 2000 RSP LC column Cyclobond 2000 DMPLC column Cyclobond 2000 RN LC column Cyclobond 2000 SN LC column
- GC Chiraldex - DM capillary GC column Chiraldex G-PN GC column
Result and Discussion Derivatized cyclodextrin chiral stationary phase
ephedrine
amphetamine
methamphetamine
pseudoephedrine
Chiraldex G-PN column
Chiraldex - DM column
Selegiline
* The ability to rapid determine enantiomeric rations of methamphetamine and its possible precursors in a single run can be useful for forensic identification
* IT is not necessary for routine pharmaceutical analyses
LC
CE
AMMA
AM
MA
Selegiline
- o-phthaldehyde (OPA)- naphthalene- dialdehyde (NDA)- aromatic anhydrides (AA)- 9- fluorenylmethylchloroformate (FMOC)- 6- aminoquinolyl-N-hydroxysuccinimidyl carbamate (AQC)
- For chiral amines and amino acid where enantioseparations are also involved AQC, AA and FMOC Fluorescent tagging agent
- LC enantiomeric separation of AQC-amphetamine tagging agent
Reversed- organic mode
Polar- organic mode
- LC separation of AQC-methamphetamine
- Clearly, different approaches are useful for biological assay , forensic assays and QC of a pharmaceutical product - One chiral separation method may be superior to another