Browsing by Author "Turgut, Yilmaz"
Now showing items 1-18 of 18
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Asymmetric transfer hydrogenation of acetophenone derivatives with novel chiral phosphinite based ?6-p-cymene/ruthenium(II) catalysts
Aydemir, Murat; Meric, Nermin; Baysal, Akin; Turgut, Yilmaz; Kayan, Cezmi; Seker, Sevil; Togrul, Mahmut (Elsevier Science Sa, 2011)Enantioselective reduction of prochiral ketones to optically active secondary alcohols is an important subject in synthetic organic chemistry because the resulting chiral alcohols are extremely useful, biologically active ... -
Bis(phosphinite) with C2-Symmetric Axis; Effects on the Ruthenium(II)-Catalyzed Asymmetric Transfer Hydrogenation of Acetophenone Derivatives
Aydemir, Murat; Durap, Feyyaz; Kayan, Cezmi; Baysal, Akin; Turgut, Yilmaz (Georg Thieme Verlag Kg, 2012)Chiral ruthenium catalyst systems generated in situ from [Ru(eta(6)-p-cymene)(mu-Cl)Cl](2) complex and chiral C-2-symmetric bis(phosphinite) ligands based on amino alcohol derivatives were employed in the asymmetric transfer ... -
Chiral separation of amino acids using a chiral crown ether by impregnation on a polymeric support and monoamine modified silica gel
Seyhan, Serap; Turgut, Yilmaz; Merdivan, Melek; Hosgoren, Halil (Pergamon-Elsevier Science Ltd, 2006)A chiral monoaza-15-crown-5 ether derivative was prepared from L-Leucinol and used as a chiral stationary phase. The new chiral stationary phases CSP-1 and CSP-2 were employed in separating the enantiomers of the sodium ... -
Enantiomeric discrimination of chiral organic salts by chiral aza-15-crown-5 ether with C1 symmetry: experimental and theoretical approaches
Kocakaya, Safak Ozhan; Turgut, Yilmaz; Pirinccioglu, Necmettin (Springer, 2015)The work involves an experimental (H-1 NMR) and theoretical (MD, MM-PBSA and DFT) investigation of the molecular recognition and discrimination properties of a chiral aza-15-crown-5 against methyl esters of alanine, ... -
Enantiomeric recognition of amino acid ester salts by ?-cyclodextrin derivatives: an experimental and computational study
Rezanka, Michal; Stibor, Ivan; Azizoglu, Murat; Turgut, Yilmaz; Pirinccioglu, Necmettin (Arkat Usa Inc, 2016)beta-cyclodextrin derivatives bearing benzoyl (beta-CD-1) and naphthoyl beta-CD-2) moieties have been synthesized from salicylic acid and 3-hydroxy-2-naphthoic acid by a convenient method in 60% and 58% yields, respectively, ... -
?-Hydroxyamide derivatives of salicylic acid as organocatalysts for enantioselective reductions of prochiral ketones
Turgut, Yilmaz; Azizoglu, Murat; Erdogan, Asli; Arslan, Nevin; Hosgoren, Halil (Pergamon-Elsevier Science Ltd, 2013)In order to find the most effective catalyst for the enantioselective reduction of a prochiral ketone, a series of novel beta-hydroxyamide derivatives of salicylic acid and chiral amino alcohols were synthesized. Different ... -
Microwave-assisted synthesis of novel amide based chiral tripodal receptors for recognition of cation and anion sensors
Azizoglu, Sevil S.; Kaplan, Seref; Ozturk, Gulsen; Turgut, Yilmaz; Togrul, Mahmut (Arkat Usa Inc, 2016)Five novel amide based chiral tripodal receptors were synthesized under microwave irradiation by reacting nitrilotriacetic acid with chiral amino alcohols in a solvent-free medium with high yields (>= 90%). The recognition ... -
A modular design of ruthenium(II) catalysts with chiral C2-symmetric phosphinite ligands for effective asymmetric transfer hydrogenation of aromatic ketones
Aydemir, Murat; Meric, Nermin; Baysal, Akin; Gumgum, Bahattin; Togrul, Mahmut; Turgut, Yilmaz (Pergamon-Elsevier Science Ltd, 2010)Hydrogen-transfer reduction processes are attracting increasing interest from synthetic chemists in view of their operational simplicity. The new chiral C-2-symmetric ligands N,N'-bis-[(1S)-1-sec-butyl-2-O-(diphenylphosp ... -
New C2-symmetric chiral phosphinite ligands based on amino alcohol scaffolds and their use in the ruthenium-catalysed asymmetric transfer hydrogenation of aromatic ketones
Durap, Feyyaz; Aydemir, Murat; Elma, Duygu; Baysal, Akin; Turgut, Yilmaz (Elsevier France-Editions Scientifiques Medicales Elsevier, 2013)Asymmetric transfer hydrogenation processes of ketones with chiral molecular catalysts are attracting increasing interest from synthetic chemists due to their operational simplicity. C-2-symmetric catalysts have also ... -
A new efficient bis(phosphinite)-ruthenium(II) catalyst system for the asymmetric transfer hydrogenation of aromatic ketones
Durap, Feyyaz; Aydemir, Murat; Baysal, Akin; Elma, Duygu; Ak, Bunyamin; Turgut, Yilmaz (Elsevier Science Sa, 2014)Many chiral ligands bearing phosphorus donor atoms were developed and applied in the area of metal catalyzed asymmetric catalysis. A new chiral bis(phoshinite) ligand was successfully synthesized from optically active ... -
Pyridine containing chiral macrocycles: synthesis and their enantiomeric recognition for amino acid derivatives
Deniz, Pinar; Turgut, Yilmaz; Togrul, Mahmut; Hosgoren, Halil (Pergamon-Elsevier Science Ltd, 2011)Four novel C(2)-symmetric enantiomerically pure, chiral pyridine-18-crown-6 type macrocycles containing lipophilic chains at the stereogenic centers were prepared. The enantioselectivity of the new ligands toward the ... -
Pyridine-containing chiral macrocycles for the enantioselective recognition of amino acid derivatives and their molecular dynamics simulations
Turgut, Yilmaz; Kocakaya, Safak Ozhan (Pergamon-Elsevier Science Ltd, 2010)Two novel C-2-symmetric optically active pyridine-15-crown-5 type ligands containing lipophilic chains at the stereogenic centres, macrocycles 5 and 6, were prepared from (S)-1,2-propanediol and (S)-3-aryloxy-1,2-propanediol ... -
Screening of C2-symmetric chiral phosphinites as ligands for ruthenium(II)-catalyzed asymmetric transfer hydrogenation of prochiral aromatic ketones
Elma, Duygu; Durap, Feyyaz; Aydemir, Murat; Baysal, Akin; Meric, Nermin; Ak, Bunyamin; Turgut, Yilmaz (Elsevier Science Sa, 2013)Metal-catalyzed transfer hydrogenation processes provide a widely-used alternative to direct hydrogenation processes of ketones. As part of an ongoing program, we report enantioselective C-2-symmetric bis(phosphinite)-ru ... -
A series of novel ?-hydroxyamide based catalysts for borane-mediated enantioselective reductions of prochiral ketones
Azizoglu, Murat; Erdogan, Asli; Arslan, Nevin; Turgut, Yilmaz; Hosgoren, Halil; Pirinccioglu, Necmettin (Pergamon-Elsevier Science Ltd, 2016)The enantioselective reduction of prochiral ketones with borane in the presence of a chiral ligand has received considerable attention. Hydroxylamine-based chiral ligands with amide and hydroxyl functions in the presence ... -
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 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 rigid and C2-symmetric pyridino-15-crown-5 type macrocycles bearing diamide-diester functions: enantiomeric recognition for chiral primary organoammonium perchlorate salts
Seker, Sevil; Baris, Deniz; Arslan, Nevin; Turgut, Yilmaz; Pirinccioglu, Necmettin; Togrul, Mahmut (Pergamon-Elsevier Science Ltd, 2014)Four novel C-2-symmetric macrocyclic compounds with a pyridine function and possessing amide and ester lingeages were prepared. The enantiomeric discrimination abilities of these macrocycles against alpha-phenylethylammonium ...
