Dimethyl Sulfoxide → HCID 18187475, compound

Participants

Reaction Conditions

Reaction Steps

A solution of oxalyl chloride (0.34 mL, 3.9 mmol) in methylene chloride (12 mL) at −78° C. was treated with DMSO (0.43 mL, 6.0 mmol) and the resulting mixture was stirred cold for 10 min. A solution of 1-(t-butoxycarbonyl)-4-(1-(RS)-hydroxy-2-(RS)-methyl-3-oxopent-1-yl)piperidine (514 mg, 1.7 mmol) (from Step C) was added and the resulting solution was stirred cold for 1 h. N,N-Diisopropylethylamine (2.4 mL, 13.7 mmol) was added and the resulting mixture was warmed to 0° C. The reaction was quenched with 1.0 N HCl (25 mL) and extracted with ether (100 mL). The extract was dried over magnesium sulfate and concentrated. MPLC (Biotage) on a 40 S silica cartridge using 2:1 v/v hexanes/ethyl acetate as the eluent afforded 435 mg (85%) of the title compound.

Provenance & Evidence