Water → HCID 67148379, compound

Participants

Reaction Steps

Pd(PPh3)4 (173 mg, 0.149 mmol) was added to a sol. of (5-bromo-2-chloro-benzyloxy)-tert-butyl-dimethyl-silane (1.00 g, 2.98 mmol) in DME (30 mL). The mixture was stirred at rt for 20 min, and K2CO3 (411 mg, 2.98 mmol), water (10 mL) and 4,4,5,5-tetramethyl-2-vinyl-1,3,2-dioxaborolane (0.53 mL, 2.98 mmol) were added. The mixture was heated rapidly to reflux, and stirred under reflux for 2 h. The mixture was allowed to cool to rt, and was diluted with Et2O (100 mL). The mixture was washed with water, and the aq. layer was extracted back with Et2O (3×). The combined org. extracts were dried over MgSO4, filtered, and the solvents were removed under reduced pressure. Purification of the crude by FC (EtOAc/heptane 5:95) yielded the title compound (822 mg, 98%). LC-MS: tR=1.22 min.

Provenance & Evidence