JOC., 58, 3229 (1993): the fluoro-substituent can be displaced by phenols to form the corresponding diaryl-ethers, catalysed by KF on alumina with 18-crown-6.
• Displacement of the fluoro-substituent by phenols, to give the corresponding diaryl ethers, is promoted by KF on alumina in the presence of 18-crown-6: J. Org. Chem., 58, 3229 (1993).