Ethyl Acetate → 7-(5-methylthiophen-2-yl)-4-(pyrimidin-2-ylmethyl)-3,4-dihydrobenzo[f][1,4]oxazepin-5(2H)-one

Participants

Reaction Conditions

Reaction Steps

A mixture of 4-(pyrimidin-2-ylmethyl)-7-(4,4,5,5-tetramethyl-1,3,2-dioxaborolan-2-yl)-3,4-dihydrobenzo[f][1,4]oxazepin-5(2H)-one (50 mg, 0.13 mmol), 2-bromo-5-methylthiophene (28 mg, 0.156 mmol), cesium carbonate (128 mg, 0.39 mmol), 1,1′-Bis(diphenylphosphino)ferrocene]dichloropalladium (9 mg, 0.013 mmol) was dissolved in a degassed mixture of DMF and water 3/1.5 (4.5 ml). The mixture was heated in microwave at 85° C. for 40 min. The mixture was poured into EtOAc and washed with water and brine. The organic layer was collected, dried over sodium sulfate and loaded onto silica gel. A flash column (5% MeOH in EtOAc) and reverse phase chromatography gave 7-(5-methylthiophen-2-yl)-4-(pyrimidin-2-ylmethyl)-3,4-dihydrobenzo[f][1,4]oxazepin-5(2H)-one.

Provenance & Evidence