反应详情

To a suspension of 7-pyrrolidin-1-yl-3,4-dihydro-2H-naphthalen-1-ol (0.300 g, 1.382 mmol), and isopropyl 4-imidazolecarboxylate (0.149 g, 0.967 mmol), which can be prepared as described in Example 1, in THF (10 mL) at 0° C. is added triphenylphosphine (0.293 g, 1.382 mmol) and dimethyl azodicarboxylate (40% wt. in toluene, 0.505 g, 1.382 mmol). After 10 minutes, the cooling bath is removed and the mixture is stirred for another 30 minutes. Water is added and the mixture is extracted with ethyl acetate. The organic phase is dried over sodium sulfate, filtered and concentrated. The resulting residue is purified by silica gel chromatography (elution with hexanes-ethyl acetate mixtures) to give 3-(7-pyrrolidin-1-yl-1,2,3,4-tetrahydro-naphthalen-1-yl)-3H-imidazole-4-carboxylic acid isopropyl ester; MS: (ESI) m/z 354.2 (M+H)+; 1H NMR (400 MHz, MeOD) δ ppm 1.40 (d, J=6.3 Hz, 3 H), 1.41 (d, J=6.3 Hz, 3 H), 1.66-1.75 (m, 1 H), 1.79-1.87 (m, 1 H), 1.98-2.01 (m, 4 H), 2.13-2.25 (m, 2 H), 2.77 (ddd, J=16.7, 8.8, 5.3 Hz, 1 H), 2.88 (dt, J=16.7, 5.6 Hz, 1H), 3.12-3.24 (m, 4 H), 5.27 (sept, J=6.3 Hz, 1 H), 6.14 (d, J=2.5 Hz, 1 H), 6.24 (t, J=5.1 Hz, 1 H), 6.62 (dd, J=8.6, 2.5 Hz, 1 H), 7.08 (d, J=8.6 Hz, 1 H), 7.31 (s, 1 H), 7.73 (d, J=1.3 Hz, 1 H).

1. customcan be prepared
2. customthe cooling bath is removed
3. additionWater is added
4. extractionthe mixture is extracted with ethyl acetate
5. dry with materialThe organic phase is dried over sodium sulfate
6. filtrationfiltered
7. concentrationconcentrated
8. customThe resulting residue is purified by silica gel chromatography (elution with hexanes-ethyl acetate mixtures)