Oxalyl chloride → HCID 53749054, compound

Participants

Reaction Steps

3-Carbomethoxy-3-androstene-17β-carboxylic acid, (360 mg, 0.78 mmol) was suspended in 10 ml of dry toluene and treated with 0.4 ml of oxalyl chloride for 2 hours under argon. The reaction mixture was then evaporated (1 mm Hg) and the residue was dissolved in 10 ml dry THF. A solution of 0.6 ml diisopropylamine in 2 ml dry THF was added and the reaction mixture stirred for 1 hour. The mixture was diluted with ice water and extracted with dichlorome thane. The organic layer was then washed twice with cold 5% hydrochloric acid, sodium hydroxide and brine; dried over sodium sulfate and evaporated. Chromatography on silica gel eluting with 20% ethyl acetate in hexane followed by recrystallization from diethyl ether afforded 3-carbomethoxy-3-androstene 178 N,N -diisopropylcarboxamide.

Provenance & Evidence