Dw. Slocum et al., A PREDICATIVE MODEL FOR CERTAIN DIRECTED METALATIONS .3. THE ABILITY OF A METHYL SUBSTITUENT TO INFLUENCE THE DIRECTED METALATION OF ANISOLE, Tetrahedron letters, 36(45), 1995, pp. 8171-8174
Significant increases in both rate and yield of metalation of p-methyl
anisole (p-MA) are afforded by use of incremental and stoichiometric a
mounts of TMEDA. Little metalation of the methyl protons in p-MA is ob
served under all conditions.