Dichloromethane → Tert-butyl1-(4-pyrrolidin-1-ylphenyl)cyclopropanecarboxylate

Participants

Reaction Conditions

Reaction Steps

A mixture of tert-butyl 1-(4-bromophenyl)cyclopropanecarboxylate (297.1 mg, 1.0 mmol), pyrrolidine (100.0 μL, 1.2 mmol), sodium tert-pentoxide (154.2 mg, 1.40 mmol), [1,1′-bis(diphenylphosphino)ferrocene]dichloropalladium(II), complex with dichloromethane (1:1) (24.5 mg, 0.030 mmol) and 1,1′-bis(diphenylphosphino)ferrocene (16.6 mg, 0.030 mmol) was deaerated under vacuum and then charged with nitrogen. To the mixture was added toluene (2.0 mL). The resulting mixture was heated at 100° C. for overnight. After cooling, the mixture was poured into ice-water and the resulting mixture was extracted with ethyl acetate (4×10 mL) The combined organic phase was washed with water and brine, then dried over Na2SO4, then filtered, and then concentrated under reduced pressure. The residue was purified by flash chromatography with ethyl acetate/hexane to afford tert-butyl 1-(4-pyrrolidin-1-ylphenyl)cyclopropanecarboxylate.

Provenance & Evidence