Browsing by Author "Yurttaş, Leyla"
Now showing items 1-20 of 38
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Antimicrobial activity evaluation of new 1,3,4-oxadiazole derivatives
Yurttaş, Leyla; Bülbül, Emre Fatih; Tekinkoca, Sinem; Demirayak, Şeref (University of Istanbul, 2017)In this study, we have synthesized seven novel 2-[(5-(4-chlorobenzyl)-1,3,4-oxadiazol-2-yl)thio]-N-(6-substituted benzothiazol-2-yl)acetamide derivatives (4ag) starting from ethyl 4-chlorophenyl acetate. The antimicrobial ... -
Antimicrobial evaluation of trisubstituted 2-piperazinyl thiazoles
Giray, Betül; Yurttaş, Leyla; Şahin, Zafer; Berk, Barkın; Demirayak, Şeref (İstanbul Medipol University, 2019)Thiazole and basic nitrogen containing rings are important chemical moieties of antimicrobial drugs. In recent, third generation cephalosporins include thiazole ring system. In this study, we synthesized 33 piperazine ... -
Cytotoxic, antiproliferative and apoptotic effects of new benzimidazole derivatives on A549 lung carcinoma and C6 glioma cell lines
Yurttaş, Leyla; Demirayak, Şeref; Çiftçi, Gülşen Akalın (Bentham Science Publishers, 2015)Benzimidazole ring is a versatile structure which has been extensively utilized in medicinal chemistry. Since we are working on 1,2-disubstutited benzimidazoles, we have reported new antitumor active derivatives. As a ... -
Design and synthesis of new donepezil analogs derived from arylpiperazine scaffold as acetylcholinesterase inhibitors
Şahin, Zafer; Biltekin, Sevde Nur; Bülbül, Emre Fatih; Yurttaş, Leyla; Berk, Barkın; Demirayak, Şeref (Taylor & Francis Ltd, 2020)Newly synthesized 4-substituted phenyl-2-(4-substituted phenylpiperazine-1-yl)thiazole derivatives (4a-v) were evaluated in terms of their acetylcholinesterase (AChE) inhibition activities. Twenty-two compounds were tested ... -
Discovery of novel potent human chondrosarcoma (SW1353) inhibitors: 4-(2/3/4-pyridyl)thiazole 2-acetamide derivatives
Coşkun, Göknil Pelin; Şahin, Zafer; Erdoğan, Ömer; Çevik, Özge; Biltekin, Sevde Nur; Yurttaş, Leyla; Berk, Barkın; Ülgen, Mert; Demirayak, Şeref (Elsevier B.V., 2023)Chondrosarcoma is the most common cartilage sarcoma among adult patients. It is mainly observed after the degradation of chondrocytes in the case of cell stress. Unfortunately, the mortality among patients is high as a ... -
In vitro antitumor activity evaluation of some 1,2,4-triazine derivatives bearing piperazine amide moiety against breast cancer cells
Yurttaş, Leyla; Demirayak, Şeref; Ilgın, Sinem; Atlı, Özlem (Elsevier Ltd, 2014)A series of 1,2,4-triazine derivatives bearing piperazine amide moiety has been synthesized and investigated for their potential anticancer activities. 1-[4-(5,6-Bis (4-subtituted phenyl) -1,2,4-triazin-3-yl)piperazin-1- ... -
Microwave supported synthesis of some novel 1,3-Diarylpyrazino[1,2-a] benzimidazole derivatives and investigation of their anticancer activities
Demirayak, Şeref; Kayagil, İsmail; Yurttaş, Leyla (Elsevier, 2011)The syntheses of 1,3-diarylpyrazino[1,2-a]benzimidazole derivatives and the investigation of their anticancer activities were studied. For this, 2-aryloylbenzimidazole derivatives were reacted with 2-bromoacetophenones in ... -
New chroman-4-one/thiochroman-4-one derivatives as potential anticancer agents
Demirayak, Şeref; Yurttaş, Leyla; Gündoğdu-Karaburun, Nalan; Karaburun, Ahmet Çagrı; Kayagil, İsmail (Elsevier Science Bv, 2017)The synthesis of 3-[3/4-(2-aryl-2-oxoethoxy) arylidene] chroman/thiochroman-4-one derivatives (1-34) and evaluation of their anticancer activities were aimed in this work. Final compounds were obtained in multistep synthesis ... -
Novel benzimidazole derivatives: Cytotoxic and apoptotic properties on lung cancer cell line
Yurttaş, Leyla; Akalın Çiftçi, Gülşen; Aksoy, Mehmet Onur; Demirayak, Şeref (Bentham Science Publishers, 2020)Background: Benzimidazole derivatives are privileged molecules known to have a wide variety of biological activities. In medicinal chemistry, due to the ring's structural similarity to nucleotides, its derivatives were ... -
Novel benzofurane carbonyl analogs of donepezil as acetylcholinesterase inhibitors
Şahin, Zafer; Biltekin, Sevde Nur; Yurttaş, Leyla; Berk, Barkın; Küçükkılınç, Tuba Tüylü; Demirayak, Şeref (Elsevier B.V., 2022)Donepezil is the most prescribed drug for mild to moderate Alzheimer's Disease. There is not any alternative drug with this potency yet. New scaffolds bearing benzofurans and amines are being tested for good potency on ... -
Novel benzofurane-pyrazole derivatives with anti-inflammatory, cyclooxygenase inhibitory and cytotoxicity evaluation
Şahin, Zafer; Özhan, Yağmur; Sipahi, Hande; Biltekin, Sevde Nur; Yurttaş, Leyla; Berk, Barkın; Demirayak, Şeref (Walter de Gruyter GmbH, 2022)Novel benzofurane-pyrazolone hybrids have been synthesized for evaluating their anti-inflammatory and cytotoxic properties. 4-(2-chloroacetyl)-1,5-dimethyl-2-phenyl-1,2-dihydro-3H-pyrazol-3-one were reacted with alpha-hydroxy ... -
Novel benzothiazole based imidazole derivatives as new cytotoxic agents against glioma (C6) and liver (HepG2) cancer cell lines
Yurttaş, Leyla; Ertaş, Merve; Akalın Çiftçi, Gülşen; Temel, Halide Edip; Demirayak, Şeref (University of Istanbul, 2017)In this work, some novel N-(6-substituted-benzothiazol-2-yl)-2-[[4,5-dimethyl-1-((p-tolyl/4-nitrophenyl)amino)-1H-imidazol-2-yl]thio]acetamide derivatives were synthesized and searched for their cytotoxic activities against ... -
Novel cyanothiouracil and cyanothiocytosine derivatives as concentration-dependent selective inhibitors of U87MG glioblastomas: Adenosine receptor binding and potent PDE4 inhibition
Şahin, Zafer; Biltekin, Sevde Nur; Yurttaş, Leyla; Berk, Barkın; Özhan, Yağmur; Sipahi, Hande; Gao, Zhanguo; Jacobson, Kenneth A.; Demirayak, Şeref (Elsevier France-Editions Scientifiques Medicales Elsevier, 2021)Thiouracil and thiocytosine are important heterocyclic pharmacophores having pharmacological diversity. Antitumor and antiviral activity is commonly associated with thiouracil and thiocytosine derivatives, which are well ... -
Novel thiazole-piperazine derivatives as potential cholinesterase inhibitors
Demirayak, Şeref; Şahin, Zafer; Ertaş, Merve; Bülbül, Emre Fatih; Bender, Ceysu; Biltekin, Sevde Nur; Berk, Barkın; Sağlık, Begüm Nurpelin; Levent, Serkan; Yurttaş, Leyla (Wiley, 2019)Dementia is a cognitive disorder mostly associated with Alzheimer's disease (AD) in addition to being seen in many other diseases of the central nervous system (CNS). The limited number of drugs is not sufficient to provide ... -
Potent ribonucleotide reductase inhibitors: Thiazole-containing thiosemicarbazone derivatives
Ertaş, Merve; Şahin, Zafer; Bülbül, Emre Fatih; Bender, Ceysu; Biltekin, Sevde Nur; Berk, Barkın; Yurttaş, Leyla; Nalbur, Aysu M.; Çelik, Hayati; Demirayak, Şeref (Wiley, 2019)The antioxidant, antimalarial, antibacterial, and antitumor activities of thiosemicarbazones have made this class of compounds important for medicinal chemists. In addition, thiosemicarbazones are among the most potent and ... -
Pyridine-substituted thiazolylphenol derivatives: Synthesis, modeling studies, aromatase inhibition, and antiproliferative activity evaluation
Ertaş, Merve; Şahin, Zafer; Berk, Barkın; Yurttaş, Leyla; Biltekin, Sevde Nur; Demirayak, Şeref (Wiley-VCH Verlag, 2018)Drugs used in breast cancer treatments target the suppression of estrogen biosynthesis. During this suppression, the main goal is to inhibit the aromatase enzyme that is responsible for the cyclization and structuring of ... -
Studies on non-steroidal inhibitors of aromatase enzyme; 4-(aryl/heteroaryl)-2-(pyrimidin-2-yl)thiazole derivatives
Şahin, Zafer; Ertaş, Merve; Berk, Barkın; Biltekin, Sevde Nur; Yurttaş, Leyla; Demirayak, Şeref (Pergamon-Elsevier Science Ltd, 2018)Steroidal and non-steroidal aromatase inhibitors target the suppression of estrogen biosynthesis in the treatment of breast cancer. Researchers have increasingly focused on developing non-steroidal derivatives for their ... -
Synthesis and anti-cancer activity evaluation of new aurone derivatives
Demirayak, Şeref; Yurttaş, Leyla; Gündoğdu Karaburun, Nalan; Karaburun, Ahmet Çağrı; Kayagil, İsmail (Taylor and Francis, 2015)In this study, we have synthesized 2-[3-or 4-(2-aryl-2-oxoethoxy) arylidene] benzofuran-3-one derivatives (D1-D38) and evaluated their anti-cancer activities. The final compounds were obtained in multistep synthesis reactions ... -
Synthesis and antibacterial evaluation of novel benzimidazole, benzothiazole, benzofurane, and naphtofurane derivatives of aminothiazoles
Şahin, Zafer; Tok, Büşra Işıl; Akgün, Erol; Çaşkurlu, Ayşegül; Yurttaş, Leyla; Berk, Barkın; Demirayak, Şeref (Ankara Association of Pharmaceutical Sciences, 2022)The thiazole ring is the core of bioactive molecules that generate broad activity. These activities include anticonvulsant, antimicrobial, antituberculosis, antiviral, etc. In this work, starting from seconder/cyclic amines, ... -
Synthesis and anticancer activity of some 1H-inden-1-one substituted (heteroaryl)acetamide derivatives
Karaburun, Ahmet Çağrı; Gündoğdu-Karaburun, Nalan; Yurttaş, Leyla; Kayagil, İsmail; Demirayak, Şeref (Bentham Science Publishers Ltd., 2019)Background: The synthesis of 2-[3/4-((6-substituted-1-oxo-2,3-dihydro-1H-inden-2ylidene) methyl)phenoxy]-N-(heteroaryl)acetamide derivatives and the investigation of their anticancer activity were studied. Methods: ...
