Iodine → 1,1-Bis(4-dimethylaminophenyl)-2-(di-t-butylphosphino)propene

Participants

Reaction Steps

Into a reactor were introduced 1.44 g (4.00 mmol) of the 1,1-bis(4-dimethylaminophenyl)-2-bromopropene obtained in Example 4 (2), 0.107 g (4.4 mmol) of magnesium, and 11.5 mL of THF under a nitrogen atmosphere. A slight amount of iodine was added to the mixture to ascertain initiation of a reaction. Thereafter, the reaction mixture was refluxed for 2 hours and then cooled. Thereto were added 0.416 g (4.2 mmol) of copper chloride and 0.91 mL (4.4 mmol) of chlorodi-tert-butylphosphine. The reaction mixture was refluxed for 18 hours and then cooled to room temperature. Thereto were added 22.5 mL of heptane and 7.5 mL of diethyl ether. The crystals yielded were taken out by filtration and dissolved in 30 mL of ethyl acetate. The resultant solution was washed with 28% ammonia water and an aqueous sodium chloride solution and then dried with anhydrous magnesium sulfate. Thereafter, the solvent was removed under reduced pressure. The concentrate was recrystallized from ethanol to obtain 0.34 g (20%) of the target compound as white crystals.

Provenance & Evidence