Dimethyl Sulfoxide → HCID 86686498, compound

Participants

Reaction Conditions

Reaction Steps

A mixture of 46 mL DMSO and 500 mL dichlormethane was cooled to −78° C. and a solution of 68 mL, trifluoroacetic anhydride in 200 mL dichlormethane was added. Then, a solution of 50.6 g tert-butyl 5-hydroxy-3-methylazepane-1-carboxylat in 500 mL dichlormethane was added. The mixture was stirred at −78° C. for 1 h, 128 mL triethylamine was added and the mixture was warmed to RT. 1 L water was added and the layers were separated. The aqueous fraction was extracted two times with 500 mL dichlormethane. The combined organic fractions were dried, filtered and concentrated. Column chromatography on silica with ethyl acetate/heptane (1:4) yielded 13.7 g of the desired product. (M+H)+: 228

Provenance & Evidence