Bromine → 3-(4-Bromo-5-trimethylsilanyl-isoxazol-3-yl)-pyridine

Participants

Reaction Conditions

Reaction Steps

To a solution of anhydrous CCl4 (80 ml) containing compound 62 (4.45 g, 15.4 mmol) was added (1.1 eq, 1.04 ml) Br2. After the addition, the resulting solution was stirred for 18 hours at 40° C. The reaction mixture was cooled and concentrated in vacuo. Ethyl acetate was added and the organic layer was washed with a saturated NaHCO3 solution, dried (Na2SO4), filtered and concentrated in vacuo. Purification by flash chromatography (diethyl ether) afforded 3-(4-bromo-5-trimethylsilanyl-isoxazol-3-yl)-pyridine (63) as an oil (4.5 g, ˜100%). 1H-NMR (400 MHz, CDCl3) δ 9.08 (d, J=2 Hz, 1H), 8.73 (dd, J=5 Hz, 2 Hz, 1H), 8.14 (dt, J=8 Hz, 2 Hz, 1H), 7.46-7.41 (m, 1H), 0.40 (s, 9H).

Provenance & Evidence