Peracetic Acid → HCID 58042462, compound

Participants

Reaction Steps

3-Chloro-2-(tetrahydro-2H-pyran-4-yloxy)pyridine (Preparation 25, 1.40 g, 6.55 mmol) and bis(pinacolato)diboron (6.65 g, 13.11 mmol) were dissolved in heptane (30 mL) and degassed five times with nitrogen. Di-tert-butyldipyridyl (0.017 mg, 0.066 mmol) was added, followed by (1,5-cyclooctadiene)(methoxy)lridium(I) dimer (0.022 mg, 0.033 mmol). The mixture was again degassed five times with nitrogen and stirred at room temperature for 18 hours. The reaction was quenched by slow addition of methanol (50 mL) and concentrated in vacuo to afford a red/orange oil, which was purified by silica gel chromatography eluting with 66% EtOAc in heptane to afford an impure product. The obtained crude product was dissolved in and a 1:1 mixture of acetic acid:water (30 mL) was added and cooled to 5° C. (ice bath). Peracetic acid was slowly added over 2 minutes. The reaction was stirred at 5° C. for 30 minutes, then a 1 M aqueous solution of sodium thiosulfate was added. The reaction was allowed to slowly warm to room temperature over 30 minutes, diluted with water (50 mL) and extracted with EtOAc (3×50 mL). The combined organics were then dried over magnesium sulfate, filtered, and concentrated in vacuo to afford a yellow oil, which was purified by silica gel chromatography eluting with EtOAc to afford an off-white solid. The solid was triturated in heptane to afford the title compound as a white solid (0.483 g, 43%):

Provenance & Evidence