2-bromo-N-methylpropanamide

Conditions: temp:0.00; pressure:0.00; stir:

Conditions: temp:0.00; pressure:0.00; stir:

Conditions: temp:0.00; pressure:0.00; stir:; See reaction.notes.procedure_details.

Procedure: A suspension of 4-(4,4,5,5-tetramethyl-1,3,2-dioxaborolan-2-yl)-1H-pyrazole (5.29 g, 27.3 mmol), 2-bromo-N-methylpropanamide (9.05 g, 54.5 mmol) and potassium carbonate (5.65 g, 40.9 mmol) in 136 ml acetone was refluxed for 68 hours. The white suspension was filtered through Celite with acetone washes; and the filtrate was concentrated and purified via silica gel chromatography (80 mm; 1 L 65% ethyl acetate/hexanes to 80% ethyl acetate/hexanes) to afford the title compound. was refluxed for 68 hours The white suspension was filtered through Celite with acetone washes and the filtrate was concentrated purified via silica gel chromatography (80 mm; 1 L 65% ethyl acetate/hexanes to 80% ethyl acetate/hexanes)

Conditions: temp:0.00; pressure:0.00; stir: