Browsing by Author "Aral, Tarik"
Now showing items 1-15 of 15
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Asymmetric Organocatalytic Efficiency of Synthesized Chiral ?-Amino Alcohols in Ring-Opening of Glycidol with Phenols
Aral, Tarik; Karakaplan, Mehmet; Hosgoren, Halil (Springer, 2012)A series of novel chiral beta-amino alcohols 3-5 and 7-10 were synthesized by regioselective ring opening of epoxides and chiral amines with a straightforward method in high yields (up to 99 %). Kinetic resolution of racemic ... -
C2-Symmetric chiral diamine ligands for enantiomeric recognition of amino acid esters and mandelic acid by proton NMR titration method
Aral, Hayriye; Aral, Tarik; Colak, Mehmet; Ziyadanogullari, Berrin; Ziyadanogullari, Recep (Tubitak Scientific & Technological Research Council Turkey, 2013)Two novel C-2-symmetric chiral diamines containing alpha-phenylethyl and alpha-(1-naphthyl)ethyl chiral subunits were prepared with quantitative yields. Enantiomeric recognition properties of these simple structured diamine ... -
Chiral lariat ethers as membrane carriers for chiral amino acids and their sodium and potassium salts
Aydin, Isil; Aral, Tarik; Karakaplan, Mehmet; Hosgoren, Halil (Pergamon-Elsevier Science Ltd, 2009)Four chiral lariat ethers 8-11 containing a (p-methoxyphenoxy) methyl side arm were used for chiral discrimination of amino acids in their zwitterionic form or as potassium and sodium salts in transport across a bulk ... -
Development of a novel amide-silica stationary phase for the reversed-phase HPLC separation of different classes of phytohormones
Aral, Hayriye; Aral, Tarik; Ziyadanogullari, Berrin; Ziyadanogullari, Recep (Elsevier, 2013)A novel amide-bonded silica stationary phase was prepared starting from N-Boc-phenylalanine, cyclohexylamine and spherical silica gel (4 mu m, 60 angstrom). The amide ligand was synthesised with high yield. The resulting ... -
Enantioselective complexation of chiral lariat crown ethers and chiral primary alkylammonium perchlorates
Koylu, M. Zafer; Aral, Tarik; Karakaplan, Mehmet; Kocakaya, Safak Ozhan; Hosgoren, Halil (Tubitak Scientific & Technological Research Council Turkey, 2011)In order to investigate the enantiomeric recognition abilities toward 2 chiral alkylammonium perchlorates (AmI, AmII) by H-1-NMR titration method in CDCl3, 4 chiral lariat ethers 8-11 with a (p-methoxyphenoxy) methyl ... -
HPLC Separation of Different Groups of Small Polar Compounds on a Novel Amide-Embedded Stationary Phase
Aral, Hayriye; Aral, Tarik; Celik, K. Serdar; Ziyadanogullari, Berrin; Ziyadanogullari, Recep (Springer Heidelberg, 2014)Retention behaviors of an amide-embedded silica base stationary phase, which was recently developed by our group, were studied by using six different groups of small polar compounds including phenolic compounds, substituted ... -
Imine containing C2-Symmetric chiral half sandwich ?6-p-cymene-Ru(II)- phosphinite complexes: Investigation of their catalytic activity in the asymmetric transfer hydrogenation of ketones
Saleh, Najmuldain Abdullah; Pasa, Salih; Kayan, Cezmi; Meric, Nermin; Sunkur, Murat; Aral, Tarik; Aydemir, Murat (Elsevier, 2020)New chiral C-2-symmetric bis(phosphinite) ligands containing imine group were synthesized from 1-({[(1R,2R)-2-{[(2-hydroxynaphthalen-1-yl)methylidene] amino}cyclohexyl]- imino}methyl)- naphthalen-2-ol and two equivalents ... -
Preparation of a novel ionic hybrid stationary phase by non-covalent functionalization of single-walled carbon nanotubes with amino-derivatized silica gel for fast HPLC separation of aromatic compounds
Aral, Hayriye; Celik, K. Serdar; Aral, Tarik; Topal, Giray (Elsevier Science Bv, 2016)Single-walled carbon nanotubes (SWCNTs) were immobilized on spherical silica gel with a 4-mu m average particle size and a 60-angstrom average pore size. The amino-derivatized silica gel was non-covalently coated with ... -
Separation, optimization, and quantification of cytokinins by a recently developed amide-embedded stationary phase
Aral, Hayriye; Hasimi, Duygu; Aral, Tarik; Levent, Abdulkadir; Ziyadanogullari, Berrin (Taylor & Francis Inc, 2017)In this study, some plant growth regulators known as cytokinins [kinetin (K), zeatin (Z), thidiazuron (TDZ), benzylaminopurine (BAP), and dimethylallylaminopurine (AAP)] were separated by HPLC using an amide-embedded ... -
Synthesis and Crystal Structure of Chiral Substituted (S)-2-[(4-Methoxyphenoxy) Methyl]-15-Crown-5 Ether with Sodium Perchlorate Complex
Dogan, Nermin; Ozbey, Sueheyla; Karakaplan, Mehmet; Aral, Tarik (Springer/Plenum Publishers, 2008)The crystal and molecular structure of chiral crown ether, (S)-2-[(4-methoxyphenoxy)methyl]-15-crown-5 center dot NaClO4, has been determined by single-crystal X-ray diffraction. The complex crystallizes in the orthorombic ... -
The synthesis and formation of complexes between derivatives of chiral Aza-18-crown-6 ethers and chiral primary organic ammonium salts
Karakaplan, Mehmet; Turgut, Yilmaz; Aral, Tarik; Hosgoren, Halil (Springer, 2006)Chiral mono aza-18-crown-6 derivatives have been prepared in optically active form and high yield from amino alcohols via a cyclization reaction with tetraethylene glycol ditosylate. The enantiomeric recognition by these ... -
Synthesis of a mixed-model stationary phase derived from glutamine for HPLC separation of structurally different biologically active compounds: HILIC and reversed-phase applications
Aral, Tarik; Aral, Hayriye; Ziyadanogullari, Berrin; Ziyadanogullari, Recep (Elsevier Science Bv, 2015)A novel mixed-mode stationary phase was synthesised starting from N-Boc-glutamine, aniline and spherical silica gel (4 mu m, 60 angstrom). The prepared stationary phase was characterized by IR and elemental analysis. The ... -
Synthesis of C2-Symmetric Chiral Amino Alcohols: Their Usage as Organocatalysts for Enantioselective Opening of Epoxide Ring
Turgut, Yilmaz; Aral, Tarik; Karakaplan, Mehmet; Deniz, Pinar; Hosgoren, Halil (Taylor & Francis Inc, 2010)A series of -amino alcohols derivatives were synthesized from (R)-2-amino-1-butanol and (S)-1,2-propanediol, and they have been used as organocatalaysts in the racemic ring opening of epoxide in good yields with high ... -
Synthesis of novel C2-symmetric chiral crown ethers and investigation of their enantiomeric recognition properties
Turgut, Yilmaz; Aral, Tarik; Hosgoren, Halil (Pergamon-Elsevier Science Ltd, 2009)A series of new C-2-symmetric chiral aza crown ether macrocycles 1-4 have been synthesized from (S)-3-aryloxy-1,2-propanediol and (S)-1,2-propanediol for the enantiomeric recognition of amino acid ester derivatives. These ... -
Synthesis of novel chiral Schiff-base ligands and their application in asymmetric nitro aldol (Henry) reaction
Colak, Mehmet; Aral, Tarik; Hosgoeren, Halil; Demirel, Nadir (Pergamon-Elsevier Science Ltd, 2007)Chiral Schiff-bases prepared from chiral amino alcohols catalyze the enantio selective Henry (nitro aldol) reaction between nitromethane and p-nitrobenzaldehyde in the presence of Cu(OTf)(2) and Zn(OTf)(2). Zn(OTf)(2) ...
