Thionyl Chloride → 5-Chlorocarbonyl-pyridine-2-carboxylic acid methyl ester

Participants

Reaction Steps

In step A, the carboxylic acid functionality of the appropriate 2,5-pyridinedicarboxylic acid, 2-methyl ester (1) (Nippon Kagaku Zasshi, 1967, 88, 563) is converted to its acid chloride using techniques and procedures well known and appreciated by one of ordinary skill in the art, using a reagent such as thionyl chloride, to provide the corresponding 6-carbomethoxynicotinoyl chloride (2).

Provenance & Evidence