Yazar "Üngören, Sevket Hakan" için listeleme
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A facile protocol for the preparation of 5-alkylidene and 5-imino substituted hydantoins from N,N '-disubstituted parabanic acids
Üngören, Sevket Hakan; Kani, İbrahim; Günay, Ahmet (Pergamon-Elsevier Science LTD, 2012)A convenient procedure for the preparation of various substituted (thio)hydantoins is described. The method is based on Wittig and aza-Wittig reactions of parabanic acids with phosphonium ylides. The reactions occurred ... -
Preparation of perinones via a novel multicomponent synthesis of isoindole scaffold
Üngören, Sevket Hakan; Koca, İrfan; Yılmaz, Filiz (Pergamon-Elsevier Science LTD, 2011)A convenient procedure for the preparation of isoindole derivatives is described. The method is based on the multicomponent reaction of heterocyclic ketene aminals with dialkyl acetylenedicarboxylates in presence of DMAP. ... -
Synthesis and Structural Characterization of Pyrrole Heterocyclic Systems Bearing Amino Acid Units: Novel Pyrrol-3-ones, Pyrrolo[1,2-a][3,1]benzoxazines, and Pyrrolo[2,1-b][1,3]oxazoles
Koca, İrfan; Sacmaci, Mustafa; Yılmaz, Filiz; Üngören, Sevket Hakan (Wiley-Blackwell, 2014)Furan-3-one derivatives 1 were converted into 2-hydroxy-pyrrole-3-ones 4 by reacting with various - and -amino acids. In contrast, the reaction of furan-3-ones and 1-aminocyclobutanecarboxylic acid afforded spiro-pyrrolo ... -
The synthesis of new pyrrolo[1,2-a]perimidin-10-one dyes via two convenient routes and its characterizations
Koca, İrfan; Üngören, Sevket Hakan; Kibriz, İbrahim E.; Yılmaz, Filiz (Elsevier Sci LTD, 2012)Efficient synthesis of pyrrolo[1,2-a]perimidin-10-ones (4, 8) are accomplished via two new convenient methods in moderate yields. The first method is the reaction of oxalyl chloride with heterocyclic ketene aminals (HKAs) ...
