Aniline → 2-ethyl-4-[(2'-(1-(4-nitrophenyl)-1H-tetrazol-5-yl)biphenyl-4-yl)methoxy]quinoline

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A mixture of 2-ethyl-4-quinolone (1.9 g; 11 mmol), (prepared using a similar procedure to that described in Org. Syn., Coll., Vol. III, p. 374 and p. 593 from aniline and ethyl propionylacetate), and potassium carbonate (2.28 g; 16 mmol) in NMP (75 ml) was heated at 60° C. for 20 minutes with stirring. Compound E (5.2 g; 10 mmol) was added and the reaction mixture heated at 80° C. for 90 minutes. The mixture was allowed to cool to ambient temperature and water (150 ml) was added. The resultant precipitate was collected by filtration, dried at 60° C., then recrystallised from toluene to give 2-ethyl-4-[(2'-(1-(4-nitrophenyl)-1H-tetrazol-5-yl)biphenyl-4-yl)methoxy]quinoline (A) (1.5 g) as a solid, m.p. 204°-206° C.; NMR (CDCl3): 1.42(3H, t), 3.0(2H, q), 5.23(2H, s), 6.67(2H, d), 6.75(1H, s), 6.85(2H, d), 7.25(2H, d), 7.43(1H, d), 7.55(1H, t), 7.70(3H, m) 7.90(3H, d), 8.05(1H, d), 8.20(1H, d).

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