Pyruvic Acid → 1H-Pyrrolo[2,3-b]pyridine-2,5-dicarboxylic acid, 5-Methyl ester

Participants

Reaction Steps

A solution of 5.6 g 6-Amino-5-iodo-nicotinic acid methyl ester, 5.3 g 2-Oxo-propionic acid, 11.1 g NEt3, 4.2 g Triphenylphosphine and 1.1 g Pd(OAc)2 in 100 mL DMF was heated under argon to 100° C. After 10 h the reaction mixture was concentrated under reduced pressure and the residue was strirred with 250 mL water for 1 h. The precipitated product was collected by filtration and washed with water. The crude product was subjected to the next reaction step without further purification.

Provenance & Evidence