Chemical and Pharmaceutical Bulletin p. 909 - 918 (1996)
Update date:2022-08-04
Topics:
Takeya, Tetsuya
Yamaki, Shinobu
Itoh, Toshimasa
Hosogai, Hiroko
Tobinaga, Seisho
We have established a new general synthesis for (±)- dibenzocyclooctadiene lignans, including (±)-schizandrin (1a), (±)-gomisin A (1b), (±)-isoschizandrin (3a), and (±)-isogomisin A (3b), via the spiro- dienone ethers E- and T-11 as the key intermediates, prepared from the corresponding bisarylbutanol derivatives E- and T-10 by the oxidation with Weitz' aminium salt, tris(4-bromophenyl)aminium hexachloroantimonate (BAHA). These syntheses consist of 13 steps from the phenylpropanone 5.
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