Summary
Schiff bases such as benzylideneaniline, benzylidene-p-anisidine, benzylidene-α-naphthylamine, and thienylideneaniline react in the presence of BF3 with dihydropyran and 2-methyl-4,5-dihydrofuran by diene addition to form 1,2,3,4-tetrahydroquinoline derivatives as adducts.
Literature cited
L. S. Povarov, V. I. Grigos and B. M. Mikhailov, Izv. AN SSSR. Ser. khim.1963, 2039.
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Povarov, L.S., Grigos, V.I., Karakhanov, R.A. et al. The reactions of dihydropyran and 2-methyldihydropyran with some Schiff bases. Russ Chem Bull 13, 163–165 (1964). https://doi.org/10.1007/BF01179592
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DOI: https://doi.org/10.1007/BF01179592