Ethanol → 4-(4-Amino-3-cyclohex-1-enyl-phenyl)-piperidine-1-carboxylic acid tert-butyl ester

Beteiligte Stoffe

Reaktionsbedingungen

Reaktionsschritte

A flask was charged with 4-(4-amino-3-bromo-phenyl)-piperidine-1-carboxylic acid tert-butyl ester (0.13 g, 0.36 mmol) (as prepared in the previous step), cyclohex-1-enyl boronic acid (0.060 g, 0.48 mmol), Pd(PPh3)4 (0.04 g, 10 mol %), aqueous 2M Na2CO3 (1.5 mL), ethanol (1.5 mL), and toluene (3 mL), and heated at 80° C. for 3 h. The reaction was diluted EtOAc (10 mL), washed with NaHCO3 (2×10 mL) and brine (10 mL), and the organic layer was dried over Na2SO4 and then concentrated. The title compound was eluted from a 20-g SPE cartridge (silica) with 30% EtOAc/hexane to give 0.10 g (85%) of the title compound as a yellow oil. Mass spectrum (ESI, m/z): Calcd. for C22H32N2O2, 357.2 (M+H). found 357.1.

Herkunft & Nachweise