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- W2090345872 abstract "A synthesis of the unusual ansa-bridged farnesyl hydroquinone derivative likonide B in racemic form is described. The natural product, also known as smenochromene D, was obtained from geranylacetone by a route in which the key steps are a regioselective microwave-mediated Claisen rearrangement of an aryl propargyl ether to deliver the chromene ring, and macrocyclization via an intramolecular Mitsunobu reaction. Subsequent HPLC on a chiral stationary phase gave the pure (+)- and (−)-enantiomers, that were studied by CD spectroscopy, thereby shedding some light on the true stereochemical nature of the two natural products (−)-smenochromene D and (+)-likonide B." @default.
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- W2090345872 date "2009-01-01" @default.
- W2090345872 modified "2023-10-10" @default.
- W2090345872 title "Synthesis of (±)-likonide B (smenochromene D) using a regioselective Claisen rearrangement, separation of the enantiomers and stereochemical assignment" @default.
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- W2090345872 doi "https://doi.org/10.1039/b901358j" @default.
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