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Toplam kayıt 17, listelenen: 1-17

A computational study on the design of donor - acceptor copolymers for organic photovoltaic materials

Kahraman, Birce. (Thesis (M.S.) - Bogazici University. Institute for Graduate Studies in Science and Engineering, 2017., 2017.)

Organic solar cells are one kind of renewable energy. In this study, 50 different donor-acceptor oligomers, which were used for photovoltaic materials, were investigated by using 5 different acceptors, which are ...
Aldol reactions of conformationally stable o-CF3 phenyl bearing axially chiral thiohydantoins

Bacak Erdik, Melis. (Thesis (M.S.) - Bogazici University. Institute for Graduate Studies in Science and Engineering, 2021., 2021.)

Novel axially chiral thiohydantoin derivatives bearing an o-CF3 phenyl ring have been synthesized atroposelectively from the reaction of R and S alanine, phenyl alanine and valine methyl ester HCl salts with ortho-triflu ...
Asymmetric syntheses, ring opening and stereoselective reactions, absolute conformation and activation barrier determinations on axially chiral oxazolidine derivatives

Ordu, Öznur Demir. (Thesis (Ph.D.)-Bogazici University. Institute for Graduate Studies in Science and Engineering, 2008., 2008.)

In this study, sterically hindered 5-methyl-3-(o-aryl)-2,4-oxazolidinediones, 5-methyl- 3-(o-iodophenyl)-2-thioxo-4-oxazolidinedione and 5,5-dimethyl-3-(o-aryl)-2,4- oxazolidinediones have been synthesized. Diastereomeric ...
Atroposelective synthesis and reactions of axially chiral thiohydantoins

Sarıgül, Sevgi. (Thesis (Ph.D.)-Bogazici University. Institute for Graduate Studies in Science and Engineering, 2017., 2017.)

Nonracemic axially chiral thiohydantoins were synthesized atroposelectively by the reaction of ortho-arylisothiocyanates with amino acid ester salts in the presence of triethylamine (TEA). However, the synthesis of the ...
Axialy chiral n-(o-aryl)-2-thioxo-oxazolidine-4-one and rhodanine derivatives: enantiomeric separation and determination of racemization barriers

Yılmaz, Esra Müjde. (Thesis (Ph.D.)-Bogazici University. Institute for Graduate Studies in Science and Engineering, 2008., 2008.)

In this study, sterically hindered 5,5-dimethyl-3-(o-aryl)-2-thioxo-4-oxazolidinones, 5,5-dimethyl-3-(o-aryl)-2-thioxo-4-thiazolidinones and 3-(o-aryl)-2-thioxo-4- thiazolidinones(rhodanines) have been synthesized as ...
Barriers to enantiomerization of 1-(o-ARYL) barbituric and -2-thiobarbituric acid derivaties

Oğuz, Semin Funda. (Thesis (Ph.D.) - Bogazici University. Institue for Graduate Studies in Science and Engineering, 2002., 2002.)

In this study, 5,5-dimethyl-1-(0-aryl)barbituricI, 1-(0-ary1)barbituric and 1-(0-aryi)- 2-thiobarbituric acids have been synthesized by the reaction of the o-arylureas or the oaryl- 2-thioureas with the diethylmalonate or ...
Computational approaches to assess the binding properties of ligands :|the case of the NMDA receptor

Haşlak, Zeynep Pınar. (Thesis (Ph.D.) - Bogazici University. Institute for Graduate Studies in Science and Engineering, 2019., 2019.)

One of the important issues in drug design is the identification of the biological activity of receptor ligands. Development, synthesis and activity measurements of ligands have a major importance in drug design. However, ...
Hindered rotation versus racemisation in axially chiral thiohydantoin derivatives

Arıca, Oya. (Thesis (M.S.) - Bogazici University. Institute for Graduate Studies in Science and Engineering, 2016., 2016.)

In this project 5-benzyl-3-(aryl)-2-thiohydantoin and 5-isobutyl-3-(aryl)-2-thiohydantoin derivatives have been synthesized by reacting aryl isothiocyanates with S-phenylalanine methyl ester hydrochloride or with S-leucine ...
Modelling the enantiomerization and atroposelectivity in thiohydantoin derivatives

Azizoğlu, İpek. (Thesis (M.S.) - Bogazici University. Institute for Graduate Studies in Science and Engineering, 2022., 2022)

Thiohydantoins have a wide range of pharmacological and biological properties. In the previous studies, nonracemic axially chiral thiohydantoins were synthesized and computational investigations have rationalized the ...
Role of ionic liquids on the reactivity and selectivity of diels- alder reactions and single site catalysts

Akgül, Deniz. (Thesis (Ph.D.) - Bogazici University. Institute for Graduate Studies in Science and Engineering, 2022., 2022)

Ionic liquids (ILs) have gained interest because of their features such as high thermal stability, high chemical inertness, conductivity, their ability to dissolve organic and inorganic substances. It is possible to tune ...
Stereochemical investigations on 2-arylimino-3-aryl-thiazolidine-4-one derivatives

Erol, Şule. (Thesis (M.S.)-Bogazici University. Institute for Graduate Studies in Science and Engineering, 2006., 2006.)

In this study, stereostructures of 2-arylimino-3-aryl-thiazolidine-4-ones have beeninvestigated. The compounds to be studied have been synthesized by the reaction of thecorresponding N,N'-diarylthioureas with -bromoacetic ...
Stereoisomers resulting from the hindered rotation in N-(o-ARYL)-2,4-oxazolidinedione derivatives

Ordu, Öznur Demir. (Thesis (M.S.) - Bogazici University. Institute for Graduate Studies in Science and Engineering, 2001., 2001.)

In this study, sterically hindered 5-methyl-3-(o-aryl)-2,4-oxazolidinediones and 5,5-dimethyl-3-(o-aryl)-2,4-oxazolidinediones have been synthesized by the reaction of the o-aryl isocyanates with (S)-(-)-ethyllactate or ...
Synthesis and barriers to rotation in axially chiral barbituric and thiobarbituric acid derivatives

Olgun, Elif. (Thesis (M.S.)-Bogazici University. Institute for Graduate Studies in Science and Engineering, 2005., 2005.)

In this study, 5,5-dimethyl-1-(0-bromopheny1)-2-thiobarbituric acid has been synthesized by the reaction of the corresponding N-o-arylthiourea with the dimethylmalonic acid in the presence of acetylchloride. The o-fluoro ...
Synthesis and kinetic studies on axially chiral heterocyclic compounds

Hakgör, Ari. (Thesis (M.A.) - Bogazici University. Institute for Graduate Studies in the Social Sciences, 2018., 2018.)

This thesis consists of two parts. In the first part, axially chiral (S)-5-methyl-3-(otolyl)oxazolidine-2,4-dione was synthesized as a single enantiomer. The optical stability of C-5 chiral center of the compound was tested ...
Synthesis and reactions of thioureas, their cyclized derivatives and oxazolidindiones

Tunçel, Şenel Teke. (Thesis (Ph.D.) - Bogazici University. Institute for Graduate Studies in Science and Engineering, 2019., 2019.)

In this study, several single enantiomer thioureas were synthesized and converted to their cyclic derivatives: 2-imino-thiazolidin-4-ones and 5-benzylidene derivatives. The conformations of the thioureas were determined ...
Synthesis of axially chiral thiazolidine derivatives and their atroposelective reactions

Erol, Şule. (Thesis (Ph.D.)-Bogazici University. Institute for Graduate Studies in Science and Engineering, 2012., 2012.)

In this study, various axially chiral thiazolidine-4-one and 4-thiones and their corresponding 5-benzylidene derivatives were synthesized in which the N3(sp2)-Carylbond rotation is hindered and used as scaffolds for the ...
Synthesis, HPLC and NMR studies on axially chiral pyridine compounds as potential bidentate N,N'-ligands

Işıkgör, Furkan Halis. (Thesis (M.S.)-Bogazici University. Institute for Graduate Studies in Science and Engineering, 2012., 2012.)

In this study, axially chiral enantiomeric and diastereomeric 2-arylimino-3-aryl-thiazolidine-4-ones have been synthesized and their stereostructures have been investigated. In these compounds, the rotation around N3-aryl ...

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