Hydrochloric Acid → Ethyl 4-(4-aminophenyl)-4-methylpiperidine-1-carboxylate

Participants

Reaction Conditions

Reaction Steps

A mixture of ethyl 4-(4-bromophenyl)-4-methylpiperidine-1-carboxylate (2.0 g, 6.13 mmol), biphenyl-2-yldicyclohexylphosphine (0.054 g, 0.153 mmol), 1M LiHMDS in THF (12.26 ml, 12.26 mmol), and Pd2(dba)3 (0.056 g, 0.061 mmol) was heated in a sealed vial at 65° C. overnight. The mixture was cooled to room temperature and treated with 1N aq. HCl (30.7 mL, 30.7 mmol) and stirred for 5 min. The mixture made basic with 1N NaOH and extracted twice with methylene chloride. The combined organic extracts were concentrated and the residue was purified by MPLC (ISCO, hexane/ethyl acetate, 24+40 g stacked silica gel columns) to give 924 mg (57%) of product as a yellow oil.

Provenance & Evidence