N-Carbethoxyphthalimide → 2-(2-(4-Bromophenyl)-5,8-dioxaspiro[3.4]octan-2-yl)isoindoline-1,3-dione

Participants

Reaction Conditions

Reaction Steps

A mixture of 2-(4-bromophenyl)-5,8-dioxaspiro[3.4]octan-2-amine (7-1) (2.7 g, 9.50 mmol), ethyl 1,3-dioxo-1,3-dihydro-2H-isoindole-2-carboxylate (4.2 g, 19.0 mmol), and TEA (5.3 mL, 38.0 mmol) in CHCl3 (50 mL) was stirred at 70° C. for overnight. The solvent was evaporated under reduced pressure, and to the residue was added MeOH. The resulting solid was collected by filtration to give 2-[2-(4-bromophenyl)-5,8-dioxaspiro[3.4]oct-2-yl]-1H-isoindole-1,3(2H)-dione (7-2) as a colorless solid.

Provenance & Evidence