Browsing by Author "Rollas, Sevim"
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Publication Open Access Asetilkolin esteraz inhibitörü olan hidrazid hidrazonlar üzerinde çalışmalar(2015) Mohsen, Usame Abu; Bedia Koçyiğit Kaymakçıoğlu; Oruç-Emre, Emine Elçin; Kaplancıklı, Zafer Asım; Rollas, Sevim; TR48361; TR5363; TR1006Amaç: On beş adet hidrazit-hidrazon türevi sentezlenmiş ve asetilkolinesteraz enzimini (AChE) inhibe etme yetenekleri Ellman’ın modifiye spektrofotometrik yöntemi ile değerlendirilmiştir. Yöntem: Anti-asetilkolinesteraz aktivite tayini Ellman’ın modifiye edilmiş spektrofotometrik yöntemi kullanılarak yapılmıştır. Bu spektrofotometrik yöntem bir kromojenik reaktif olan 5,5-ditiyo-bis-(2-nitrobenzoik asit) ile salınan tiyokolinin renkli bir ürün vermesi esasına dayanır. Bulgular: Test edilen bileşikler arasında, 4-fluorobenzoik asit [(4-metoksifenil) metilen] hidrazid(6) ve 2-[(fluorobenzoil) hidrazono]-1,3-dihidroindol-3-on (15), referans ilaç donezepil (IC50=0.054±0.002μM) ile kıyaslandığında kayda değer anti-AChE aktivite göstermiştir. Sonuç: Anti- AChE aktivite sonuçları, p-metoksifenil sübstitüenti taşıyan bileşik 6 ve 1,3-dihidro-indol-3-on sübstitüenti taşıyan bileşik 15’in en aktif bileşikler olduğunu göstermiştir. Aktivite sonuçlarından, hidrazidhidrazon yapısı üzerinde hacimli grupların bulunmasının anti- AChE aktiviteye olumlu yönde katkıda bulunduğu görülmektedir.Publication Open Access High pressure liquid chromatographic assay of mephenoxalone(Marmara Pharmaceutical Journal, 1987) Rollas, Sevim; TR173493In this paper, a high pressure liquid chromatographic method was developed for the determination of mephenoxalone using clopamide as an internal standart.Item Metadata only İlaçların Metabolizması: (Biyotransformasyon)(Marmara Üniversitesi Yayınevi, 1992) Rollas, SevimPublication Metadata only Quinazolinones .13. Synthesis of 3-[2-(2,3-dihydro-5-phenyl-4-substituted-3h-1,2,4-triazole-3-thione-2-yl)-acetylamino]-2-methyl-4(3h)-quinazolinones and their pharmacological activities(1989) Büyüktimkin, Servet; Büyüktimkin, Nadir; Özdemir, Osman; Rollas, SevimPublication Open Access Reductive cleavage of azo compounds with hydrazine hydrate and some new 1,3,4-thiadiazole derivatives(Marmara Pharmaceutical Journal, 1985) Rollas, Sevim; TR173493Reductive cleavage of azo compounds with hydrazine hydrate and some new 1,3,4-thiadiazole derivatives.Publication Metadata only Synthesis and characterization of new 1,3,4-oxadiazolines(1989) Ergenç, Nedime; Rollas, Sevim; Topaloǧlu, Yalçin; Ötük, GültenPublication Open Access Synthesis and characterization of some arylhydrazones of p-(benzoylamino)benzoic acid hydrazide(Marmara Pharmaceutical Journal, 1991) Rollas, Sevim; TR173493Publication Open Access The synthesis and evaluation of anti-acetylcholinesterase activity of some 4(3H)-quinazolinone derivatives bearing substituted 1,3,4- thiadiazole(2017) Uraz, Mine; Karakuş, Sevgi; Mohsen, Usama Abu; Kaplancıklı, Zafer Asım; Rollas, Sevim; TR172613; TR1006In the present study, a series of 4(3H)-quinazolinone derivatives (5a-f) were synthesized through the cylization reaction of substituted 1,3,4-thiadiazoles containing an aromatic primary amin and anthranilic acid in the presence of acetic anhydride and acetic acid. The structures of the synthesized compounds were confirmed by elemental analysis, IR, 1 H-NMR and mass spectroscopic (5b and 5f) methods. Each derivative was evaluated for its ability to inhibit acetylcholinesterase (AChE) using a modification of Ellman’s spectrophotometric method. Compounds 2-methyl-3-{4-[5-(ethylamino)-1,3,4-thiadiazol- 2-yl]phenyl}quinazolin-4(3H)-one (5b) and 2-methyl-3-{4-[5- (cyclohexylamino)-1,3,4-thiadiazol-2-yl]phenyl}quinazolin- 4(3H)-one (5d) can be identified as promising anticholinesterase agents due to their inhibitory effect when compared with donepezil as a reference drug.Publication Open Access Synthesis and evaluation of cytotoxic activities of some substituted isoxazolone derivatives(Marmara Pharmaceutical Journal, 2011) Rollas, Sevim; TR173493Publication Open Access Synthesis and spectrametric analysis of some new azopyrazole substituted 1,2,4-triazole-5-thiones(Marmara Pharmaceutical Journal, 1990) Rollas, Sevim; TR173493Bu çalışmada, 1,3-dimetil-2-arilhidrazono-1,2,3-propantrionların purpald (4-amino-3-hidrazino-1,4-dihidro-5H-1,2,4-triazol-5-tion) ile asidik ortamda kondensasyonu sonucunda yeni azopirazol türevi bileşikleri kazanılmıştır. Oluşan azopirazol türevlerinin yapıları kimyasal, analitik ve spektroskopik yöntemler yardımı ile kanıtlanmıştır.Publication Open Access Synthesis of 2,4-dihydro-3H-1,2,4-triazole-3-thione and 2,3-dihydro-1,3,4-thiadiazole derivatives(Marmara Pharmaceutical Journal, 1986) Rollas, Sevim; TR173493Synthesis of 2,4-dihydro-3H-1,2,4-triazole-3-thione and 2,3-dihydro-1,3,4-thiadiazole derivatives