Dimethyl Sulfoxide → HCID 14882986, compound

Participants

Reaction Steps

A solution of 1.2 ml (13.3 mmole) of oxalyl chloride in 30 ml of methylene chloride was cooled to -70°, and a solution of 1.9 ml (26.6 mmole) of dimethylsulfoxide in 9 ml of methylene chloride was added. The mixture was stirred for 5 minutes and a solution of 6.6 g (12.1 mmole) of the title compound of Example 39 in 20 ml of methylene chloride was added. After stirring an additional 15 minutes, 8.5 ml (60.5 mmole) of triethylamine was added, and the mixture was stirred at -70° for 5 minutes and allowed to warm to room temperature. Water was added and the layers were separated. The organic layer was washed successively with dilute hydrochloric acid, 5% sodium bicarbonate solution, water and brine, dried over MgSO4, and filtered. Removal of the solvent gave 6.44 g of the title compound as a yellow oil. Structure assignment was supported by nmr and infrared spectra.

Provenance & Evidence