反应详情

温度

65 °C

To anhydrous THF (20 ml) containing 64 (0.49 g, 2.17 mmol) (see Scheme 13), were added 1.5 eq of (E)-octene-1-ylboronic acid (0.51 g). The resulting mixture was stirred for 2 hours under N2. Successively were added 2 eq of K3PO4 (0.92 g), 2 mol % of Pd(OAc)2 (10 mg) and 4 mol % of S-Phos (36 mg). After the addition, the resulting solution was warmed at 65° C. for 18 hours under N2. After cooling to room temperature, the mixture was diluted with ethyl acetate, washed with a saturated NaHCO3 solution, dried (Na2SO4), filtered and concentrated. The resulting residue was purified by flash chromatography (diethyl ether/PE 1/1) to afford 3-(4-Oct-1-enyl-isoxazol-3-yl)-pyridine (compound 67B) as an oil (0.19 g, 34%). 1H-NMR (400 MHz, CDCl3): δ 8.9 (d, J=2 Hz, 1H), 8.72 (dd, J=5 Hz, 2 Hz, 1H), 8.49 (s, 1H), 7.9 (dt, J=8 Hz, 2 Hz, 1H), 7.45-7.40 (m, 1H), 6.11-5.99 (m, 2H), 2.21-2.13 (m, 2H), 1.46-1.38 (m, 2H), 1.37-1.21 (m, 6H), 0.91 (t, J=7 Hz, 3H).

1. additionAfter the addition
2. temperatureAfter cooling to room temperature
3. washwashed with a saturated NaHCO3 solution
4. dry with materialdried (Na2SO4)
5. filtrationfiltered
6. concentrationconcentrated
7. customThe resulting residue was purified by flash chromatography (diethyl ether/PE 1/1)