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Synthesis 1986; 1986(5): 416-417
DOI: 10.1055/s-1986-31659
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Cyclization of 4-Hydroxy-(E)-2-alkenoic Esters: Simple Synthesis of Butenolides

Rikuhei Tanikaga* , Hiroshi Yamashita, Aritsune Kaji
  • *Department of Chemistry, Faculty of Science, Kyoto University, Sakyo-ku, Kyoto 606, Japan
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Publication Date:
27 September 2002 (online)

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Simple treatment of 4-hydroxy-(E)-2-alkenoic esters with benzenethiol leads to cyclization to give 3-phenylthio-4-alkanolides, which are easily converted into 3-phenylthio-2-alken-4-olides and 2-alken-4-olides (Δα,β-butenolides).