Triethylamine → Tert-butyl 4-(3-(4-(4,4,5,5-tetramethyl-1,3,2-dioxaborolan-2-yl)phenyl)propyl)piperazine-1-carboxylate

Participants

Reaction Steps

To a stirred solution of tert-butyl 4-(3-(4-bromophenyl)propyl)piperazine-1-carboxylate (2.4 g, 6.26 mmol) in acetonitrile (12 ml) was added triethylamine (2.62 ml, 18.78 mmol) and Pd-118 (0.122 g, 0.19 mmol). Reaction mixture was stirred at RT under nitrogen for 10 min. 4,4,5,5-Tetramethyl-1,3,2-dioxaborolane (1.363 ml, 9.39 mmol) added and reaction mixture heated to 80° C. for 1 h. The reaction mixture was evaporated to dryness and redissolved in EtOAc and washed with water and saturated brine. The organic was dried over magnesium sulfate, filtered and evaporated to afford crude product. The crude product was purified by flash silica chromatography using Isco Companion, 100 g silica column, elution gradient 40 to 100% EtOAc in isohexane. Pure fractions were evaporated to dryness to afford sub-title compound as a brown oil. Yield: 0.9 g

Provenance & Evidence