Abstract
A series of benzyloxybenzaldehyde derivatives (1–3) were prepared by the reactions of 4-nitrobenzyl bromide with 4-hydroxy-3-methoxybenzaldehyde (vanillin), 2-hydroxy-3-methoxybenzaldehyde (o-vanillin) and 2-hydroxy-4-methoxybenzaldehyde. When the reaction time is quite long, benzofuran derivatives (4 and 5) were obtained by the reactions of ortho-hydroxyaldehydes with the 4-nitrobenzyl bromide. Condensation reactions among the three benzyloxybenzaldehyde derivatives (1–3) with 2-aminomethylfuran (furfurylamine) yielded the new imine compounds (6–8). The structures of these aldehydes (1–3), benzofuran derivatives (4 and 5) and imine compounds (6–8) were confirmed on the basis of elemental analyses, IR, 1H NMR and 13C NMR and mass spectroscopy. The solid-state structures of compounds 4–6 were determined by single-crystal X-ray crystallography.
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Acknowledgements
The authors gratefully acknowledge the financial assistance of the Scientific and Technical Research Council of Turkey (TUBITAK), Grand No. TBAG 109T034. We also thank Anadolu University and Medicinal Plants and Medicine Research Center of Anadolu University Eskişehir, for allowing us to use the X-ray facility.
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Hayvali, Z., Dal, H., Köksal, P. et al. Syntheses, spectroscopic and crystallographic characterizations of 4-nitrobenzyloxy derivatives and benzofurans from ortho-substituted benzaldehydes and 4-nitrobenzyl bromide. Struct Chem 21, 837–845 (2010). https://doi.org/10.1007/s11224-010-9618-6
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DOI: https://doi.org/10.1007/s11224-010-9618-6