Trifluoromethanesulfonic acid → HCID 69097842, compound

Participants

Reaction Steps

An analogous procedure to that described in Marcus A. Tius and Joel K. Kawakami Tetrahedron 1995, 51, 3997 was used. A solution of triflic acid (37 μL, 0.42 mmol) in 0.37 mL CH2Cl2 was added to a mixture of Ag2CO3 (83 mg, 0.30 mmol) in 2.8 mL CH2Cl2 and the flask was covered in aluminum foil. After 30 min., a solution of 57 (ca. 0.38 mmol, directly from above) and 2,6-di-tert-butyl-4-methylpyridine (49 mg, 0.24 mmol) in 2.8 mL CH2Cl2 was added dropwise by cannula, rinsing with 1 mL CH2Cl2. At this time, a solution of XeF2 (82 mg, 0.48 mmol) in 5.5 mL CH2Cl2 was added by cannula. The reaction was stirred for 1 h and then was quenched by addition of 10 mL saturated NaHCO3 solution. The resulting mixture was extracted with CH2Cl2 (3×30 mL) and the combined solution was dried (Na2SO4), filtered and evaporated. The residue was purified by flash chromatography on a Teledyne Isco Combiflash unit (40 g silica gel column, 0%→100% ethyl acetate/hexanes) followed by HPLC (Phenomenex 50 mm×250 mm silica gel column, 5% ethyl acetate/hexanes) to give the title compound (12 mg, 5%).

Provenance & Evidence