Akın Sağırlı

Bio: Akın Sağırlı is an academic researcher from Abant Izzet Baysal University. The author has contributed to research in topics: Cycloaddition & Aryl. The author has an hindex of 5, co-authored 15 publications receiving 58 citations. Previous affiliations of Akın Sağırlı include Cardiff University.

Rhodamine-Based Arylpropenone Azo Dyes as Dual Chemosensor for Cu2+/Fe3+ Detection

Abstract: A novel chemosensor APA-Rh based on rhodamine ring was developed for detection of Cu2+ and Fe3+ ions. For this purpose, the optical properties of the chemosensor APA-Rh were investigated in DMSO:H2O (4:1, v/v) in the presence of different metal ions such as Li+, Na+, K+, Ag+, Mg2+, Ca2+, Ba2+, Cd2+, Zn2+, Cu2+, Hg2+, Cr2+, Pb2+, Fe2+, Mn2+, Co2+, Fe3+, Cr3+, and Al3+. The chemosensor APA-Rh exhibited high selectivity and sensitivity for Cu2+ and Fe3+ ions among other metal ions. Detection limit (LOD), interaction stoichiometry and association constant values were calculated for Cu2+ and Fe3+ ions. LOD values for Cu2+ and Fe3+ were 1.04 μM and 0.91 μM, respectively. It was also found that the response time of APA-Rh was as low as 0.5 min and the other metal ions did not cause interference for detection of Cu2+ and Fe3+ ions. The results showed that the new chemosensor APA-Rh is a both colorimetric and fluorometric reversible dual sensor for Cu2+ and Fe3+ ions.

Microwave-assisted coupling reaction of N-aryl sydnones with 2-nitromethylenethiazolidine: unexpected formation of (Z)-2-(nitro((E)-p-substitutedphenyldiazenyl)methylene)thiazolidines.

Abstract: Reaction of N-aryl sydnones with 2-nitromethylenethiazolidine straightforwardly gives rise to the formation of (Z)-2-(nitro((E)-p-substitutedphenyldiazenyl)methylene)thiazolidines in xylene and dimethoxyethane under microwave irradiation. A meaningful and plausible mechanism for this transformation is proposed, which anticipates the extrusion of an aceto-lactone-like moiety before a coupling occurs. The structures of all the new compounds were identified on the basis of the data obtained from the NMR, IR, X-ray diffraction spectra, HRMS measurements, and physical characteristics.

Regioselective 1,3-dipolar cycloaddition of phenanthrolinium N-ylides to substituted arylidene oxazolones

Abstract: The 1,3-dipolar cycloaddition reactions of phenanthrolinium ylides have been investigated. Thus 15 novel aryl substituted spiro[oxazole-4,10′-pyrrolo[1,2-a][1,10] phenanthrolin]-5-ones were prepared in a regioselective manner, by the treatment of phenanthrolinium ylides with (Z)-arylidene oxazolones.

Chemistry of Ketene N,S-Acetals: An Overview.

Abstract: Push–pull alkenes, which bear electron-donating and -accepting group(s) at both termini of a C═C double bond, respectively, are of interest not only for their unique electronic properties but also for their importance as versatile building blocks in organic synthesis. In the world of ketene acetals having the push–pull alkene skeleton, ketene N,S-acetal is most likely the biggest family according to the number and types of these compounds. The first ketene N,S-acetal compound was reported in 1956. As a cyclic ketene N,S-acetal compound, nithiazine, the first lead structure of neonicotinoid insecticides, was reported in 1978. The characteristics of ketene N,S-acetals, which have the structural feature of ketene S,S-acetals and enaminones, make them versatile and easy to use, especially in cyclization and multicomponent reactions for the synthesis of various heterocyclic systems and related natural products. There has been an increasing wealth of information about the synthesis and synthetic applications of...