Morpholine → Methyl 3fluoro-5-morpholino-7,8-dihydronaphthalene-2-carboxylate

Participants

Reaction Steps

To a mixture of methyl 3fluoro-5-oxo-5,6,7,8-tetrahydronaphthalene-2-carboxylate (0.155 g, 0.698 mmol) and morpholine (0.304 mL, 3.49 mmol) in toluene (5.0 mL) at 0° C. was added titanium(IV) chloride (1M in toluene) (0.384 mL, 0.384 mmol) dropwise. The ice-bath was removed, and the orange, heterogeneous reaction mixture was stirred at room temperature for 16 hours. The heterogeneous, orange reaction mixture was filtered under reduced pressure through a pad of Celite which was then rinsed with toluene (3×10 mL). The pale yellow filtrate was concentrated under reduced pressure to give methyl 3fluoro-5-morpholino-7,8-dihydronaphthalene-2-carboxylate (0.122 g, 0.419 mmol, 60.0% yield). The product had an LC/MS M+1=292.2.

Provenance & Evidence