Ammonia → 1-(8-Quinolyl)-2-methylindene

Participants

Reaction Conditions

Reaction Steps

6.70 ml of n-BuLi (16.8 mmol) were added dropwise at 100° C. to 3.50 g of o-bromoquinoline (16.8 mmol) dissolved in 50 ml of THF, and the mixture was subsequently stirred at 80° C. for 15 minutes. A solution of 50 ml of THF and 2.45 g of 2-methyl-1-indanone (16.8 mmol) was then added to the lithiated bromoquinoline over the course of 10 minutes. The mixture was allowed to cool to room temperature, and the solution was then refluxed for three hours, cooled to room temperature, acidified to pH 1 using ice and hydrochloric acid and subsequently refluxed for three hours. The reaction mixture was adjusted to pH 9 using ammonia solution, and the aqueous phase was extracted with diethyl ether. The combined organic phases were dried, and the solvent was removed. The crude product was purified by distillation under reduced pressure at 150-160° C./10−2 mbar, giving 1.5 g of 1-(8-quinolyl)-2-methylindene (45%) as a yellow, viscous resin.

Provenance & Evidence