İ. Koca, Ş. H. Üngören, İ. E. Kıbrız
Nov 1, 2012
Citations
0
Influential Citations
19
Citations
Journal
Dyes and Pigments
Abstract
Abstract 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) containing perimidine moiety (3), and the second is the reaction of 1,8-naphthalenediamine (1) with 2-alkoxycarbonylmethylene substituted furan-3-ones (7). The visible absorption spectrums of 4 and 8 were dominated by the characteristic perimidines bands in the region 381–439 nm. While compounds 4b-d show thermal stability up to 250 °C, compounds 8 are stable up to 216–235 °C. The structures of all products were confirmed by IR, 1H and 13C NMR spectroscopic methods, in case of 8b also by XRD analysis.