M. Benincasa et al., ZINC PROMOTED ADDITION OF METHYL 2,2-DIHALOCARBOXYLATES TO CARBONYL-COMPOUNDS, Synthetic communications, 26(22), 1996, pp. 4113-4122
Methyl 2,2-dihalocarboxylates add easily to carbonyl compounds in fair
to good yields through the intermediate formation of 2-haloester enol
ates; the reaction is promoted by zinc, following a ''Barbier'' type p
rocedure.