U. Azzena et al., METALATION OF ARYLMETHYL METHYL ETHERS AND CONNECTION WITH THEIR REDUCTIVE ELECTROPHILIC SUBSTITUTION, Tetrahedron letters, 36(31), 1995, pp. 5641-5644
Stable alpha-methoxy arylmethyl carbanions can be generated by metalat
ion of arylmethyl methyl ethers, 1, with n-BuLi in THF at -40 degrees
C, avoiding Wittig rearrangement to the corresponding alkoxides 2. Rea
ction of these carbanions with various electrophiles afforded the expe
cted products 3 in satisfactory yields. Connection between the metalat
ion procedure and the reductive electrophilic substitution of arylmeth
yl methyl ethers allowed the transformation of compounds 1 into 2-aryl
propanoic acids, 5.