In 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 (C,H,N,S), IR, 1H-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 (IC50 =0.054±0.002 μM) as a reference drug.
Bu çalışmada, aromatik pirimer
amin içeren sübstitüe 1,3,4-tiyadiazoller
ile antranilik asitin asetik asit ve asetik
anhidritli ortamdaki siklizasyonundan bir seri 4(3H)- kinazolinon türevi (5a-f) sentez edildi.
Bileşiklerin yapıları IR, 1H-NMR, kütle
spektroskopisi (5b ve 5f) ve elementel analiz
yöntemleri kullanılarak aydınlatıldı. Bileşiklerin aktivite tayini Ellman’ın modifiye edilmiş
spektrofotometrik yöntemi kullanılarak
yapıldı. Donepezil standardı ile karşılaştırıldığında bileşik 5b (2-metil-3-{4-[5-(etilamino)-1,3,4-tiyadiazol-2-il] fenil}kinazolin-4(3H)-on) ve bileşik 5d
(2-metil-3-{4-[5- (siklohegzilamino)-1,3,4-tiyadiazol-2-il]fenil}kinazolin-4(3H)- on) inhibitör etkilerine göre
antikolinesteraz ajanları olarak tanımlanabilirler.
Subjects | Health Care Administration |
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Journal Section | Articles |
Authors | |
Publication Date | September 9, 2016 |
Published in Issue | Year 2017 Volume: 21 Issue: 1 |