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- W1480515514 abstract "Elongatin, 4', 5-dihydroxy-2', 5'-dimethoxy-2, 2-dimethylpyrano[5, 6-g]isoflavone (1), was prepared by the oxidative rearrangement of 6'-acetoxy-2', 4-bis(benzyloxy)-2, 5-dimethoxy-2, 2-dimethyldihydropyrano[5, 6-c]chalcone (15) with thallium(III) nitrate and by dehy-drogenation of the resultant linear 4', 5-dihydroxy-2', 5'-dimethoxy-2, 2-dimethyldihydropyrano-[5, 6-g]isoflavone (19) with 2, 3-dichloro-5, 6-dicyano-1, 4-benzoquinone. Its angular isomer, 4', 5-dihydroxy-2', 5'-dimethoxy-2, 2-dimethylpyrano[6, 5-h]isoflavone (2), was also synthesized from the corresponding chalcone (28) in a similar manner and then converted into toxicarol isoflavone (3)." @default.
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- W1480515514 date "1988-01-01" @default.
- W1480515514 modified "2023-10-11" @default.
- W1480515514 title "Synthesis of pyranoisoflavones by the oxidative rearrangement of dihydropyranochalcones with thallium(III) Nitrate: Synthesis of elongatin, its angular isomer, toxicarol isoflavone, and related compounds." @default.
- W1480515514 cites W1983352396 @default.
- W1480515514 doi "https://doi.org/10.1248/cpb.36.592" @default.
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