反应详情

温度

100 °C

A mixture of benzyl bromide (3.87 mL, 31.9 mmol), (4S,7R)-2-phenyl-7,8,8-trimethyl-1,2,4,5,6,7-hexahydro-4,7-methano-indazol-3-one (Intermediate 6; 2.14 g, 8.0 mmol) and tetra-n-butylammonium iodide (2.06 g, 5.6 mmol) in N,N-dimethylformamide (50 mL) was heated in an oil-bath at 100° C. for 16 h. The solvent was evaporated and dichloromethane (100 mL) and water were added. The aqueous layer was extracted with dichloromethane (2×100 mL) and the combined organic layers were washed with water (5×100 mL). The solvent was evaporated and the residue purified on an Isco 120 g column, eluting with 33-100% ethyl acetate/hexanes to give (4S,7R)-1-benzyl-7,8,8-trimethyl-2-phenyl-1,2,4,5,6,7-hexahydro-4,7-methano-indazol-3-one (2.41 g, 84%) as an off-white/tan solid. ES(+)-MS (M+H) 359.

1. customThe solvent was evaporated
2. additiondichloromethane (100 mL) and water were added
3. extractionThe aqueous layer was extracted with dichloromethane (2×100 mL)
4. washthe combined organic layers were washed with water (5×100 mL)
5. customThe solvent was evaporated
6. customthe residue purified on an Isco 120 g column
7. washeluting with 33-100% ethyl acetate/hexanes