Hexamethylphosphoramide → HCID 57292408, compound

Participants

Reaction Conditions

Reaction Steps

A mixture of 1.02 g (4.68 mmol) of N-(4'-fluorophenyl)-3-methylglutarimide (Compound 66), 0.88 g (2.2 mmol) of 2,4-bis(4-methoxyphenyl)-1,3-dithia-2,4-diphosphetane-2,4-disulfide (known as Lawesson's Reagent), and 6 ml of hexamethylphosphoramide in a 50 ml round-bottomed flask was warmed to 95°-100° C. for 21 hours. An additional 1.05 g (2.5 mmol) of Lawesson's Reagent were added and heating to 100° C. was continued for an additional 30 hours. The mixture was allowed to cool to room temperature and water (50 ml) was added. The mixture was extracted with ether (4×50 ml). The organic portions were combined, dried over MgSO4 and the solvent was removed in vacuo. The resulting 2 g of orange oil were purified via flash chromatography (silica gel, 1:1 hexanes/methylene chloride) to yield 300 mg (28% yield) of yellow oil which solidified to a solid: m.p. 84.5°-87.5° C.

Provenance & Evidence