Hydrochloric Acid → 2,2-Dimethyl-5-[1-(4-o-tolylmethanesulfinyl-phenyl)-but-2-ynyl]-[1,3]dioxane-4,6-dione

Participants

Reaction Conditions

Reaction Steps

Hydrogen peroxide (20 μL, 0.05 mmol) was added to a 0° C. solution of 28.3 (20 mg, 0.05 mmol) in AcOH (2 mL). The reaction was stirred at 80° C. for 1.5 hours, then cooled to room temperature and stirred for 16 hours. The reaction mixture was poured into cold water and the resulting solution was acidified to pH=2 with 6N HCl(aq). The aqueous layer was extracted with ethyl acetate and sec-butanol. The combined organic layers were concentrated to yield 10 mg (50%) of 2,2-Dimethyl-5-[1-(4-o-tolylmethanesulfinyl-phenyl)-but-2-ynyl]-[1,3]dioxane-4,6-dione (29.1). LC/MSD m/e: 383.0 (consistent with di-acid-H).

Provenance & Evidence