1-Bromonaphthalene → HCID 14502047, compound

Participants

Reaction Steps

To a tetrahydrofuran solution of magnesium 1-naphthylbromide prepared from 1.22 g of metallic magnesium and 10.35 g of α-bromonaphthalene in 50 ml of tetrahydrofuran was added a solution of 6.16 g of N-(2-diethylaminoethyl)-phthalimide in 10 ml of tetrahydrofuran under ice cooling. After stirring for 2 hours under ice cooling, the mixture was concentrated under reduced pressure. To the residue were added 6.61 g of ammonium sulfate, 100 ml of ethyl ether and 100 ml of water. After shaking, the aqueous layer was discarded and 100 ml of water was added to the organic layer. The pH was adjusted to 1.5 with 4N-hydrochloric acid. After shaking, the organic layer was discarded and 100 ml of ethyl ether was added to the aqueous layer. The pH was adjusted to 11.5 with 10N-sodium hydroxide solution. After shaking, the aqueous layer was discarded. After the organic layer was washed with saturated aqueous sodium chloride solution, the organic layer was dried over anhydrous sodium sulfate and concentrated to dryness under reduced pressure. The crude crystals obtained were recrystallized from diisopropyl ether to give 2.85 g of 2-(2-diethylaminoethyl)-3-hydroxy-3-(1-naphthyl)isoindolin-1-one (Compound 20).

Provenance & Evidence