Keywords
3,4-dihydro-2H-thiopyrans
diene-transmissive reactions
dienes
dienophiles
enethiones
hetero-Diels–Alder reaction
Lawesson’s reagent
thioketones
Abstract
The reaction distyryl thioketone with donor alkenes (norbornene and styrene) gives adducts of the hetero-Diels–Alder reaction. In the case of maleic acid derivatives, a tandem reaction occurs which leads to polycyclic derivatives of 3,4-dihydro-2H-thiopyran. The stereochemical features of the ongoing transformations were examined.
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