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EVOLUTION OF PERIODONTICS: AN INSIGHT INTO THE PAST
The specialty of Periodontics has a long history dating back to prehistoric written evidence. Ancient Indian and Chinese describe scurvy and advocate cleansing of teeth for health. On through theExpand
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Indirect enantioseparation of proteinogenic amino acids using naproxen-based chiral derivatizing reagent and HPLC.
Diastereomers of 18 proteinogenic amino acids were synthesized under microwave irradiation and by vortexing using (S)-naproxen-benzotriazole as chiral derivatizing reagent. The diastereomersExpand
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Indirect enantioseparation of selenomethionine by reversed-phase high-performance liquid chromatography using a newly synthesized chiral derivatizing reagent based on (S)-naproxen moiety.
(S)-Naproxen was reacted with N-hydroxyphthalimide in the presence of coupling reagent dicyclohexylcarbodiimide, and a new chiral derivatizing reagent, phthalimidyl-(S)-naproxen ester, wasExpand
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Enantioseparation of Orciprenaline, Betaxolol, and Propranolol using HPLC and New Chiral Reagents Based on 1,5-Difluoro-2,4-dinitrobenzene
Diastereomers of three β-blockers (orciprenaline, betaxolol, and propranolol) were synthesized using three new chiral derivatizing reagents that were prepared by substituting one fluorine atom inExpand
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Resolution of enantiomers with both achiral phases in chromatography: conceptual challenge
A new practical approach has been adopted for the resolution (from racemic and non-racemic mixtures) of DL-selenomethionine using achiral phase chromatography supplemented with (−)-quinine as aExpand
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Enantioresolution of DL-selenomethionine by thin silica gel plates impregnated with (−) quinine and reversed-phase TLC and HPLC separation of diastereomers prepared with difluorodinitrobenzene based
(−)-Quinine was used as a chiral selector by adopting three approaches in TLC for direct enantioresolution of DL-selenomethionine; these included impregnation of plate by chiral selector and its useExpand
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Resolution and isolation of enantiomers of (±)-isoxsuprine using thin silica gel layers impregnated with L-glutamic acid, comparison of separation of its diastereomers prepared with chiral
Thin silica gel layers impregnated with optically pure l-glutamic acid were used for direct resolution of enantiomers of (±)-isoxsuprine in their native form. Three chiral derivatizing reagents,Expand
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Enantioresolution of Three Active Pharmaceutical Ingredients by Different Thin-Layer Chromatographic Approaches
Enantioresolution of three active pharmaceutical ingredients (APIs), namely, atenolol, betaxolol, and orciprenaline, marketed as racemic mixture, has been achieved in a direct mode using (S)-glutamicExpand
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ENANTIOSEPARATION OF ORCIPRENALINE, USING HPLC AND CHIRAL REAGENT BASED ON DFDNB
Orciprenaline is a moderately selective β-adrenergic receptor agonist and used in the treatment of asthma. Generally, the (S)-( ̶ )-enantiomer of β-blockers is pharmacologically effective, show aboutExpand