Allyl bromide → 1-Allyl-3-ethyl-3-(3-methoxy-phenyl)-azepan-2-one

Participants

Reaction Conditions

Reaction Steps

To a solution of 3-ethyl-3-(3-methoxy-phenyl)-azepan-2-one (as described in Example 8, Step A) (2.62 g, 10.6 mmol) in DMF (20 mL) at 0° C. was added NaH (0.47 g, 11.6 mmol) and the mixture was stirred for 20 min at 0° C. and 20 min at 25° C. Allyl bromide (1.1 mL, 12.7 mmol) was added. After 5 hr, additional NaH (0.12 g, 3 mmol) and allyl bromide (0.3 mL, 3.5 mmol) were added and stirring was continued for 16 hr. The reaction was quenched with H2O and the solvents removed in vacuo. The residue was partitioned between EtOAc and saturated NaHCO3 solution. The organic layer was separated, washed with brine and dried (MgSO4). Filtration and concentration gave the title compound after chromatography on silica gel with hexane and ethyl acetate 9:1.

Provenance & Evidence