反应详情

2-[2-(4-Ethylphenyl)chroman-6-yloxy]-5-nitropyridine was prepared as described for 5-nitro-2-(2-phenylchroman-6-yloxy)pyridine in Example 1(b) starting from 205 mg of 2-(4-ethylphenyl)chroman-6-ol. The product was recrystallised from a mixture of 2-propanol and acetone. 1H NMR (400 MHz, CDCl3) δ: 9.04 (d, 1H, J 2.8 Hz), 8.60 (dd, 1H, J 9.1, 2.8 Hz), 7.36 (d, 2H, J 8.1 Hz), 7.24 (d, 2H, J 8.1 Hz), 7.20 (d, 1H, J 9.1 Hz), 7.00 (d, 1H, J 2.7 Hz), 6.96 (dd, 1H, J 8.8, 2.7 Hz), 6.89 (d, 1H, J 2.7 Hz), 5.11 (dd, 1H, J 10.1, 2.2 Hz), 2.98 (m, 1H), 2.75 (m, 1H), 2.62 (q, 2H, J 7.5 Hz), 2.16 (m, 1H), 2.01 (m, 1H), 1.19 (t, 3H, J 7.5 Hz).

1. customThe product was recrystallised from a mixture of 2-propanol and acetone