5-Bromo-3-(3-chlorophenyl)-2,1-benzisoxazole → [3-(3-Chlorophenyl)-2,1-benzisoxazol-5-yl](4-methoxyphenyl)-methanone

Participants

Reaction Conditions

Reaction Steps

5-bromo-3-(3-chlorophenyl)-2,1-benzisoxazole (0.13 m) was added at −70° C. to THF (300 ml) under N2 flow. A solution of BuLi (0.143 mol) was added dropwise. The mixture was stirred at −70° C. for 10 minutes. A solution of N,4-dimethoxy-N-methylbenzamide (0.117 mol) in THF (100 ml) was added dropwise at −70° C. The mixture was stirred at −70° C. for 1 hour, poured out on ice/EtOAc and extracted with EtOAc. The organic layer was separated, dried (MgSO4), filtered, and the solvent was evaporated. The residue was crystallized from diethyl ether. The precipitate was filtered off and dried under a vacuo, yielding 19.5 g (41%) of [3-(3-chlorophenyl)-2,1-benzisoxazol-5-yl](4-methoxyphenyl)-methanone (intermediate 10).

Provenance & Evidence