• Primary OH groups can be protected as 4-methoxyphenyl ethers by Mitsunobu alkylation. These are stable to aqueous acid or base at 1000, high pressure hydrogenation, ozonolysis, LiAlH4, or Cr(VI) reagents. Deprotection can be effected with CAN: Tetrahedron Lett., 26, 6291 (1985); 29, 1389 (1988), or anodic oxidation: Carbohydr. Res., 277, 321 (1995).
• For a study of the direct dilithiation of alkoxyphenols, see: J. Org. Chem., 55, 3902 (1990).