Methyl 4-(chlorocarbonyl)benzoate → HCID 67055356, compound

Participants

Reaction Steps

A solution of 3.0 g (15 mmole) of methyl 4-(chlorocarbonyl)benzoate and 183 mg (0.2 mmole) of tris(dibenzylideneacetone)dipalladium(0) was cooled to 0° C. under N2. After 5 min, 32 mL of a 0.5 M solution of (3-cyanophenyl)(iodo)zinc in THF was added dropwise and the solution was stirred at rt. After 4 h, the reaction was quenched by addition of saturated NH4Cl solution and 30 mL ether. The layers were separated and the aqueous layer was washed with three 30 mL portions of ether. The combined organic extracts were washed with 30 mL of saturated NaHCO3 solution and 30 mL brine before being dried over MgSO4 and concentrated. The residue was dissolved in 50 mL of 1:5 CH3OH-THF and cooled to 0° C. To this was added 500 mg (13.5 mmole) of NaBH4 in two portions over 10 minutes. After 20 min, the reaction was quenched by addition of 1 mL saturated Na2SO4 solution and concentrated. The resulting slurry was diluted with ether and filtered. The solid residue was washed with ether and the combined filtrates were washed with brine, dried over Na2SO4 and concentrated to an oil that was purified by silica gel chromatography using a step-gradient of 10 to 25% EtOAc-hexane. Homogeneous fractions were combined and concentrated to afford the title compound as a white solid.

Provenance & Evidence