13C NMR spectral assignment of the A-ring of polyoxygenated flavones

Tokunaru Hòrie, Yoshizumi OHTSURU, Kenichi Shibata, +3

Phytochemistry

EngineeringBiochemistryNmr Spectral AssignmentOrganic ChemistryPhytochemistry +2

Studies of the Selective O-Alkylation and Dealkylation of Flavonoids. XXIV. A Convenient Method for Synthesizing 6- and 8-Methoxylated 5,7-Dihydroxyisoflavones.

Tokunaru Hòrie, Kenichi Shibata, Kazuyo Yamashita, +3

Chemical and Pharmaceutical Bulletin

HeterocyclicBiochemistryNatural IsoflavonesIsomeric 5Natural Sciences +13

Microwave-assisted regioselective synthesis of natural 6-prenylpolyhydroxyisoflavones and their hydrates with hypervalent iodine reagents

Mohammad Mamun Hossain, Yasuhiko Kawamura, Kazuyo Yamashita, +1

Tetrahedron

Microwave-assisted Regioselective SynthesisOrganic ChemistryHypervalent Iodine ReagentsChemistryNatural 6-Prenylpolyhydroxyisoflavones +4

Studies of the Selective O-Alkylation and Dealkylation of Flavonoids. XXII. A Convenient Method for Synthesizing 3,5,7-Trihydroxy-6-methoxyflavones.

Tokunaru Hòrie, Kenichi Shibata, Kazuyo Yamashita, +2

Chemical and Pharmaceutical Bulletin

13C-nmr SpectraNatural FlavoneEngineeringConvenient MethodSelective Demethylation +11

Studies of the Selective <i>O</i>-Alkylation and Dealkylation of Flavonoids. XVIII. A Convenient Method for Synthesizing 3,5,6,7-Tetrahydroxyflavones

Tokunaru Hòrie, Takashi Kobayashi, Yasuhiko Kawamura, +3

Bulletin of the Chemical Society of Japan

Studies of the Selective O-Alkylation and Dealkylation of Flavonoids. XIX. A Convenient Method for Synthesizing 3,5,6,7,8-Pentaoxygenated Flavones.

Tokunaru Hòrie, Yasuhiko Kawamura, H. Yamamoto, +1

Chemical and Pharmaceutical Bulletin

Corresponding 3-HydroxyflavonesPolyphenolicsBioorganic ChemistryEngineeringConvenient Method +11

Regioselective Synthesis of 6‐Prenylpolyhydroxyisoflavone (Wighteone) and Wighteone Hydrate with Hypervalent Iodine

Takanori Tokuoka, Kazuyo Yamashita, Yasuhiko Kawamura, +2

Synthetic Communications

BiochemistryNatural SciencesOxidative RearrangementHypervalent IodineOrganic Chemistry +6

Facile synthesis of polyhydroxycoumaronochromones with quinones: synthesis of alkylpolyhydroxy- and alkoxycoumaronochromones from 2′-hydroxyisoflavones

Masao Tsukayama, Akihiro Oda, Yasuhiko Kawamura, +2

Tetrahedron Letters

Facile SynthesisOrganic ChemistryHeterocycle ChemistryPharmacologySynthetic Chemistry +1

Studies of the Selective <i>O</i>-Alkylation and Dealkylation of Flavonoids. XXI. A Convenient Method for Synthesizing 3,5,7-Trihydroxy-6,8-dimethoxyflavones and 5,7-Dihydroxy-3,6,8-trimethoxyflavones

Tokunaru Hòrie, Takeshi Kitou, Yasuhiko Kawamura, +1

Bulletin of the Chemical Society of Japan

Studies of the Selective O-Alkylation and Dealkylation of Flavonoids.XX. A Convenient Method for Synthesizing 5,6,7-Trihydroxyisoflavones and 5,6-Dihydroxy-7-methoxyisoflavones.

Tokunaru Hòrie, Masahiro Sasagawa, Fumihito Torii, +2

Chemical and Pharmaceutical Bulletin

Bioorganic ChemistryEngineeringOrganic ChemistryBiosynthesisDibenzyl Ether +14