PROCESSES FOR PRODUCING 2-HALO-NICOTINIC ACID DERIVATIVES AND PRECURSORS THERETO

摘要

A process for preparing a compound of the formula (I) which comprises a base-catalyzed reaction of a compound of the formula (V). with a compound of the formula (VI) wherein X is C1 or Br and Y is a carbonyl group, to thereby form said compound of the formula (I). In addition a process for producing a 2-pyridinecarboxylate compound, comprising carbonylating a specific 2-fluoronicotinic acid compound in the presence of CO, an alcohol, and a transition metal catalyst.