Affiliation:
1. 1Faculty of Science, Department of Chemistry, Suez Canal University, Al-Arish 45511, Egypt
2. 2Higher Institute for Engineering and Technology, Engineering Chemistry Department, New Damietta 34518, Egypt
Abstract
AbstractNew 3-aryl-pyrido[2,1-b][1,3]benzothiazole derivatives 2a–e were synthesized in excellent yields via the reaction of benzothiazoleacetonitrile (1) with different aromatic aldehydes. The treatment of 2-(benzo[d]thiazol-2-yl)-3-(pyridin-4-yl)acrylonitrile (6) with malononitrile afforded 1-amino-3-(pyridin-4-yl)-3H-pyrido[2,1-b][1,3]benzothiazole-2,4-dicarbonitrile (7), which was allowed to react with a variety of reagents to provide pyrimido[5′,4′:5,6]pyrido[2,1-b][1,3]benzothiazole 8, 9 and [1,3]benzothiazolo[3,2-a][1,8]naphthyridine 10, 15 derivatives. All synthesized products were confirmed by elemental analysis, IR, 1H-NMR, 13C-NMR, and mass spectral data.
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