Acetic Anhydride → HCID 20062797, compound

Participants

Reaction Steps

[2-(4-Bromobutoxy)ethyl]benzene (10.0 g) in dry ether (80 ml) was added dropwise to magnesium turnings (0.946 g) under nitrogen with stirring to give a gentle reflux. The reaction mixture was refluxed for 1 h, allowed to cool to room temperature and added dropwise to acetic anhydride (8.07 g) in dry ether (55 ml) at -70° under nitrogen with stirring over 1.5 h. The reaction mixtures was stirred at -70° for 2 h, allowed to warm to -10°, then treated with saturated ammonium chloride (100 ml). The organic layer was separated and the aqueous layer re-extracted with ER (150 ml). The combined organic extracts were washed with 2N aqueous sodium hydroxide (150 ml), brine (150 ml), dried and evaporated to give an oil (7.54 g) which was purified by FCC eluting with ER-CX (1:3) to give the title compound as a colourless oil (4.34 g). T.l.c. (ER-CX 1:3) Rf 0.25.

Provenance & Evidence