3-bromo-4-(difluoromethoxy)benzaldehyde

反応条件: temp:65.01; pressure:0.00; stir:; See reaction.notes.procedure_details.

実験手順: A suspension of 3-bromo-4-hydroxy-benzaldehyde (4.97 mmol; 1.0 eq.), cesium carbonate (7.46 mmol; 1.5 eq.) and sodium chlorodifluoroacetate was stirred at 65° C. for 5.5 h. The mixture was partitioned with ethyl acetate and water, and the aqueous portion extracted with diethyl ether. The combined extracts were washed with successive portions of water and brine, dried over magnesium sulfate, filtered and concentrated to afford the title compound, I-286, as a yellow oil. 1H NMR (400 MHz, DMSO-d6): 7.49 (t, J=72.4 Hz, 3H), 7.54 (d, J=8.4 Hz, 1H), 8.00 (dd, J=8.4, 2.0 Hz, 1H), 8.26 (d, J=2.0 Hz, 1H), 9.96 (s, 1H) ppm. The mixture was partitioned with ethyl acetate and water the aqueous portion extracted with diethyl ether The combined extracts were washed with successive portions of water and brine dried over magnesium sulfate filtered concentrated