Triphenylphosphine → HCID 66703997, compound

Participants

Reaction Steps

Diisopropyl azodicarboxylate (40% in toluene, 13.6 g, 26.9 mmol) was added to a solution of tert-butyl (2S)-2-(4-hydroxyphenyl)morpholine-4-carboxylate (5.0 g, 17.9 mmol), triphenylphosphine (7.1 g, 27.1 mmol) and 3-bromopropanol (3.75 g, 27.0 mmol) in tetrahydrofuran (100 ml) and the solution was stirred for 10 hours at room temperature. The mixture was partitioned between water and ethyl acetate. The organic layer was washed with brine, dried over magnesium sulfate and concentrated in vacuo. The residue was purified by silica gel chromatography eluting 5-10% methanol in chloroform to furnish tert-butyl (2S)-2-(4-(3-bromopropyloxy)phenyl)morpholine-4-carboxylate (7.16 g, 100%) as a colorless oil.

Provenance & Evidence