Abstract
Base-mediated [3 + 3] cycloaddition reaction of in-situ formed aza-oxyallyl cations and 1,4-dithiane-2,5-diols has been achieved under mild reaction conditions. This strategy provides direct and efficient access to prepare desired thiomorpholin-3-one derivatives in moderate-to-high yields. The approach features broad substrates scope and short reaction time. Moreover, the resulting products can be readily converted into other useful heterocyclic compounds including 2H-1,4-thiazin-3(4H)-ones and thiomorpholine-3,5-diones.
Graphical Abstract
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