Beilstein J. Org. Chem.2018,14, 1834–1839, doi:10.3762/bjoc.14.156
cycloadduct was isolated in 37% yield.
Keywords: hetero-Diels–Alder reactions; quinonedyes; quinones; sulfur heterocycles; thiochalcones; Introduction
Hetero-Diels–Alder reactions are considered to be a powerful methodology widely explored for the synthesis of six-membered heterocycles [1][2] with numerous
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Graphical Abstract
Scheme 1:
Reactions of aryl/hetarylthiochalcones 1a–d with 1,4-naphthoquinone (2b).