Tributylphosphine → N-Boc-3-(2-piperidin-4-yl-ethoxy)-benzoic acid ethyl ester

Participants

Reaction Conditions

Reaction Steps

N-Boc-4-piperidine ethanol (15 g, 65 mmol) and ethyl 3-hydroxybenzoate (11 g, 65 mmol) were dissolved in dry THF (750 ml) under N2. To this was added tri-n-butylphosphin (24 ml, 98 mmol) and ADDP (25 g, 98 mmol) resulting in a suspension, which was stirred overnight at 20° C. The mixture was concentrated in vacuo to ˜100 ml, filtered, and the filtrate was evaporated with silica gel. Flash chromatography (EtOAc/heptane 1:4) afforded 24 g of the title compound. LC-MS (m/z): 401 (M+23).

Provenance & Evidence