title: Development and validation of HPLC method for the resolution of drug intermediates: DL-3-Phenyllactic acid, DL-O-acetyl-3-phenyllactic acid and (+/-)-mexiletine acetamide enantiomers.
abstract: Sensitive and specific, high-performance liquid chromatography (HPLC) methods have been developed and validated for linearity, accuracy and precision for the quantification of dl-3-phenyllactic acid, dl-O-acetyl-3-phenyllactic acid and (+/-)-mexiletine acetamide enantiomers. Chromatographic separations were performed on a Chiralcel OJ-H column (0.46 mm x 250 mm, 5 microm, Daicel Chemical Industries, Japan) based on cellulose tris-(4-methyl benzoate) chiral stationary phase. The mobile phase consists of hexane and isopropanol (IPA) in the ratio of 90:10 containing 0.1% trifluoroacetic acid (in case of dl-3-phenyllactic acid and dl-O-acetyl-3-phenyllactic acid) and hexane and IPA (95:5) containing 0.1% triethylamine (in case of (+/-)-mexiletine acetamide) and the flow rate was set at 0.5 ml/min at 25 degrees C. The detection was carried out at 261 nm for dl-3-phenyllactic acid and dl-O-acetyl-3-phenyllactic acid and at 254 nm for (+/-)-mexiletine acetamide. The developed methods were utilized for monitoring the progress of lipase catalyzed enantioselective synthesis of O-acetyl-3-phenyllactic acid and mexiletine acetamide from dl-3-phenyllactic acid and (+/-)-mexiletine, respectively.
authors: Biocatalysis Laboratory, Department of Pharmaceutical Technology (Biotechnology), National Institute of Pharmaceutical Education and Research (NIPER), Sector 67, S.A.S. Nagar 160062, India.
authors: Alemu
authors: A
authors: Tekewe
authors: Sawraj
authors: S
authors: Singh
authors: Manpreet
authors: M
authors: Singh
authors: Utpal
authors: U
authors: Mohan
authors: U C
authors: UC
authors: Banerjee
mesh_terms: D000081:Acetamides / Q000737:chemistry*; D002851:Chromatography, High Pressure Liquid / Q000379:methods*; D007773:Lactates / Q000737:chemistry*; D019344:Lactic Acid / Q000031:analogs & derivatives* / Q000737:chemistry*; D008801:Mexiletine / Q000031:analogs & derivatives* / Q000737:chemistry*; D015394:Molecular Structure; D015203:Reproducibility of Results; D012680:Sensitivity and Specificity
chemical_list: D000081:Acetamides; D007773:Lactates; C530081:O-acetyl-3-phenyllactic acid; C530082:mexiletine acetamide; C017648:3-phenyllactic acid; D008801:Mexiletine; D019344:Lactic Acid