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5
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66149182933
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Detailed data of isolation and structure elucidation of chafuroside B are described in Supporting Information sections II and III
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Detailed data of isolation and structure elucidation of chafuroside B are described in Supporting Information sections II and III.
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6
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4544276425
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(a) Furuta, T.; Kimura, T.; Kondo, S.; Mihara, H.; Wakimoto, T.; Nukaya, H.; Tsuji, K.; Tanaka, K. Tetrahedron 2004, 60, 9375.
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Nukaya, H.6
Tsuji, K.7
Tanaka, K.8
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Jpn. Kokai Tokkyo Koho, 13
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Kan, T.1
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9
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Suzuki, T.7
Tanaka, K.8
Kan, T.9
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10
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66149165811
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Numbering for 1 and 2 was according to flavone style.
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Numbering for 1 and 2 was according to flavone style.
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16
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52649150410
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While preparing this manuscript, a similar strategy for ring formation of prenylflavones has been reported. In their method, a prenyl group and protecting group such as TBS and Pivaloyl groups were regioselectively introduced on the flavone A ring: Minassi, A, Giana, A, Ech-Chahad, A, Appendino, G. Org. Lett. 2008, 10, 2267
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While preparing this manuscript, a similar strategy for ring formation of prenylflavones has been reported. In their method, a prenyl group and protecting group such as TBS and Pivaloyl groups were regioselectively introduced on the flavone A ring: Minassi, A.; Giana, A.; Ech-Chahad, A.; Appendino, G. Org. Lett. 2008, 10, 2267.
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31
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4544239056
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3 resulted in monobenzylation. Then hydrolysis of an acetyl group with 1 M NaOH gave desired acetophenone derivative 7. For experimental details, see Supporting Information section IV.
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3 resulted in monobenzylation. Then hydrolysis of an acetyl group with 1 M NaOH gave desired acetophenone derivative 7. For experimental details, see Supporting Information section IV.
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32
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0001397662
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66149175493
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3 did not result in a reaction. Subsequently, the desired compound was afforded in high yield using Mitsunobu conditions, which served as neutral protecting conditions using an allyl alcohol, PPh3, and DEAD. This method was also applicable to benzyl alcohol.
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3 did not result in a reaction. Subsequently, the desired compound was afforded in high yield using Mitsunobu conditions, which served as neutral protecting conditions using an allyl alcohol, PPh3, and DEAD. This method was also applicable to benzyl alcohol.
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34
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0026660870
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(a) Katritzky, A. R.; Shobana, N.; Pernak, J.; Afridi, A. S.; Fan, W.-Q. Tetrahedron 1992, 48, 7817.
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Fan, W.-Q.5
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