Toluene → Tert-butyl4-{4-[1-(tert-butoxycarbonyl)cyclopropyl]phenyl}piperazine-1-carboxylate

Participants

Reaction Conditions

Reaction Steps

A mixture of tert-butyl 1-(4-bromophenyl)cyclopropanecarboxylate (297.2 mg, 0.001000 mol), tert-butyl piperazine-1-carboxylate (186.2 mg, 0.001000 mol), sodium tert-pentoxide (110.1 mg, 0.001000 mol), [1,1′-bis(diphenylphosphino)ferrocene] dichloropalladium(II), complex with dichloromethane (1:1) (24.5 mg, 0.0000300 mol) and 1,1′bis(diphenylphosphino)ferrocene (16.6 mg, 0.0000300 mol) was deaerated and then charged with nitrogen. To the mixture was added toluene (3.0 mL, 0.028 mol), and the resulting mixture was heated at 100° C. overnight. The mixture was poured into ice-water and was extracted with ethyl acetate (4×10 mL). The combined organic layer was washed with water and brine successively, dried over Na2SO4, filtered, and concentrated under reduced pressure. The residue was purified by Combiflash with ethyl acetate/hexane.

Provenance & Evidence