A straightforward coupling of 4-sulfonylpyridines with Grignard reagents

A straightforward synthesis of alkyl-sulfonylpyridines and aryl-sulfonylpyridines is developed by coupling of sulfonylpyridines with the Grignard reagents. The protocol proceeds through a catalyst- and oxidant-free coupling of sulfonylpyridines as substrates via a Chichibabin-type reaction mechanism.