Ethyl Bromide → (1R,7S)-3-ethyl-1,10,10-trimethyl-4-phenyl-3,4-diazatricyclo[5.2.1.02,6]dec-2(6)-en-5-one

Participants

Reaction Steps

A mixture of bromoethane (1.05 mL, 14.1 mmol), potassium carbonate (3.58 g, 25.9 mmol), and (4S,7R)-2-phenyl-7,8,8-trimethyl-1,2,4,5,6,7-hexahydro-4,7-methano-indazol-3-one (Intermediate 6; 1.74 g, 6.5 mmol) in acetone (20 mL) and methanol (3 mL) was stirred at room temperature over the weekend then the solvent was evaporated and the residue was partitioned between water and dichloromethane. The organic layer was evaporated, and the residue was chromatographed (0-50% ethyl acetate/hexanes) and recrystallized from ethyl acetate to give (4S,7R)-1-ethyl-7,8,8-trimethyl-2-phenyl-1,2,4,5,6,7-hexahydro-4,7-methano-indazol-3-one (168 mg, 9%) as a white solid. APCI-MS (M+H) 297.

Provenance & Evidence