Potassium Carbonate → HCID 22593643, compound

Participants

Reaction Steps

To a suspension (vacuum degassed 3 times) of potassium carbonate (110 mg, 0.78 mmol) in toluene (5 mL) under nitrogen was added tert-butyl 2-mercaptoethylcarbamate (131 μL, 0.78 mmol) followed by stirring at ambient temperature for 1 h. To this suspension was added by cannula a solution (vacuum degassed 3 times) of methyl 3-cyano-2-{[(trifluoromethyl)-sulfonyl]oxy}-1-naphthoate (Intermediate 1, 200 mg, 0.56 mmol), (R)-Tol-BINAP (44.1 mg, 0.07 mmol), and palladium(II) acetate (14 mg, 0.06 mmol) in toluene (10 mL). The resulting suspension was stirred at 80° C. for 20 h, cooled,(reduced volume by ½ under reduced pressure, diluted with ether (12 ml) and methylene chloride (6 ml), washed organic layer with 20% K2CO3 (2×15 ml), water and brine, dried over Na2SO4, filtered, and evaporated to dryness. The residue was precipitated from 10% ethyl acetate in hexanes to give 150 mg of the title compound. An additional 40 mg (88% overall yield) of the title compound was isolated from the mother liquor by chromatography on silica gel in 20% ethyl acetate/hexanes.

Provenance & Evidence