Chemical and Pharmaceutical Bulletin
Online ISSN : 1347-5223
Print ISSN : 0009-2363
ISSN-L : 0009-2363
Total Synthesis of Racemic Ligularone and Isoligularone
Takeshi KOIKE, Naoki TAKEUCHI, Takashi OHTA, Seisho TOBINAGA
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Keywords: furanoeremophilanoid, ligularone, isoligularone, furannulation reaction, synthesis
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1999 Volume 47 Issue 6 Pages 897-899

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Abstract
Racemic ligularone (2) and isoligulatone (18) were synthesized from the cis-4aβ, 5, 6, 7, 8, 8a-hexahydro-8β, 8aβ-dimethylnapthalen-1, 3(2H, 4H)-dione (11) by furannulation reaction with diethylprop-2-ynylsulphonium bromide, prepared from diethyl sulfide and propargyl bromide.
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© The Pharmaceutical Society of Japan
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