Potassium Phosphate, Tribasic → 5-Cyclopropyl-1,3-difluoro-2-nitrobenzene

Participants

Reaction Conditions

Reaction Steps

5-bromo-1,3-difluoro-2-nitrobenzene (D24, 560 mg, 2.35 mmol), cyclopropylboronic acid (1 eq., 2.35 mmol, 0.2 g), K3PO4 (3 eq., 7.1 mmol, 1.50 g), NaBr (1 eq., 2.35 mmol, 0.24 g) and Pd(PPh3)4 (280 mg) were added to 3 ml of dry toluene and the mixture was heated by microwave at 160° C. for 40 minutes. The mixture was then poured onto water (10 ml) and extracted with ethyl acetate (3×20 ml). The combined organics were dried over MgSO4, filtered and the solvent was evaporated to afford 660 mg of brown crude product which was purified by silica gel chromatography (5-20% diethyl ether-40-60° petroleum ether) to afford the title compound as a yellow oil, 300 mg, 64%.

Provenance & Evidence