Potassium Hydroxide → 4-tert-Butylphenylacetylene

Participants

Reaction Steps

To a stirred solution of 1.44 g (6.23 mmol) of trimethylsilyl(4-tert-butyl)phenylethyne (Compound 21) in 5 ml of isopropanol was added 10 ml of 1N aqueous KOH and the mixture then stirred at room temperature for 6.5 hours. The isopropanol was removed under vacuum and the residue extracted with ether. The ether extract was washed with dilute HCl until the washings were acidic. The ether solution was then successively washed with water, saturated NaCl and NaHCO3 solutions and then dried (MgSO4). Solvent was then removed in-vacuo to give the title compound as a colorless oil. PMR (CDCl3): & 1.34 (9H, s), 3.05 (1H, s), 7.37 (2H, d, J-8.2 Hz), 7.46 (2H, d, J-8.2 Hz).

Provenance & Evidence