Nickel-catalyzed thiocarbonylation for the synthesis of thioesters-functionalized 2H-pyrones with sulfonyl chlorides as the sulfur sources

An efficient and straightforward protocol for the synthesis of thioesters-functionalized 2H-pyrones has been explored through a nickel-catalyzed thiocarbonylation reaction with sulfonyl chlorides as the sulfur sources. By using Mo(CO)₆ as both CO source and reductant, a diverse set of thioesters-containing 2H-pyrones have been obtained in moderate to good yields. This reaction provides a good supplement for the carbonylative synthesis of thioesters-functionalized 2H-pyrones via a Ni/Mo(CO)₆ catalytic system.