反应详情

To a stirred solution of 4-Methyl-3-triisopropylsilanylsulfanyl-benzoic acid ethyl ester (crude from step 1) in THF (50 mL) at 0° C. was added TBAF (13.9 mmol, 13.9 mL of a 1.0 M solution in THF). After 25 minutes, triethylamine (34.7 mmol, 4.74 mL) was added, followed by chloroacetone (16.7 mmol, 1.33 mL). The reaction was stirred for an additional 5 minutes, then subjected to standard aqueous workup. The crude material was purified by silica gel chromatography (0-50% EtOAc in hexanes) to afford the title compound.

1. customThe crude material was purified by silica gel chromatography (0-50% EtOAc in hexanes)