Aluminium lithium hydride → HCID 58168467, compound

Participants

Reaction Steps

A solution of lithium aluminum hydride (2M in THF, 2.2 mL) was added portionwise over 5 minutes to a solution of 3-(3-ethoxy-3-oxopropylthio)benzoic acid [Aromatic Intermediate 15, step a] (1.0 g) in THF (20 mL), pre-cooled in ice-water. After ˜½ the addition the mixture formed a thick precipitate and was diluted with more THF (15 mL) to maintain stirring. The mixture was removed from the cooling bath and stirred at room temperature for 3.5 hours. The mixture was cooled back down in ice-water and treated with more lithium aluminum hydride (2M in THF, 2.2 mL). The mixture was removed from the cooling bath and stirred at room temperature overnight. The cloudy solution was cooled in ice water and then quenched by the careful addition of methanol (5 mL), added portionwise over 30 minutes. After ˜½ of the addition, the mixture was removed from the cooling bath and allowed to warm to room temperature for 45 minutes. The mixture was poured into aqueous HCl (2M) and extracted three times with ethyl acetate. The combined organic extracts were washed with brine, dried over anhydrous magnesium sulphate, filtered and concentrated under reduced pressure to give the subtitled compound as a pale yellow oil. Yield 0.55 g.

Provenance & Evidence