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3
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58649098260
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The results were partially published in: Wu, Z.-H.; Wang, J.; Li, J.-C.; Chen, Y.-Z.; Yu, A.-J.; Feng, Z.-R.; Shen, J.; Wu, Y.-L.; Gao, P. F.; Wang, Y. L. Nat. Prod. R&D (China), 1994, 6, 1 (in Chinese).
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The results were partially published in: Wu, Z.-H.; Wang, J.; Li, J.-C.; Chen, Y.-Z.; Yu, A.-J.; Feng, Z.-R.; Shen, J.; Wu, Y.-L.; Gao, P. F.; Wang, Y. L. Nat. Prod. R&D (China), 1994, 6, 1 (in Chinese).
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Just before submission of this manuscript, Robertson and Naud published an elegant way to convert the endocyclic C-C bond to vicinal diol: Robertson, J.; Naud, S. Org. Lett. 2008, 10, 5445.
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58649107204
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Data for 11a (colorless oil, 1H NMR (CDCl3, 300 MHz) δ: 7.35-7.21 (m, 5H, 6.24 (s, 1H, 4.26 (d, J=2.9 Hz, 1H, 4.20-4.13 (m, 1H, 4.05-3.98 (m, 1H, 3.88 (d, J=3.0 Hz, 1H, 2.36-2.02 (m, 4H, 13C NMR (100 MHz, CDCl3) δ: 151.7, 135.2, 128.5, 128.1, 126.4, 112.2, 107.4, 69.6, 59.6, 52.9, 32.1, 24.6; FT-IR (film) ν: 3059, 2924, 1677, 1389, 1230, 1137, 1086, 1018, 919, 701 cm-1; EI-MS m/z, 230 (M, 34, 160 (38, 118 (39, 116 (42, 115 (78, 112 (100, 90 (31, 71 (49, EI-HRMS calcd for C14H14O3 (M, 230.0943, found 230.0947. Data for 11b (colorless oil, 1H NMR (CDCl 3, 300 MHz) δ: 7.31-7.24 (m, 4H, 6.17 (s, 1H, 4.19-4.12 (m, 2H, 4.05-3.88 (m, 2H, 2.38-2.00 (m, 4H, 13C NMR (100 MHz, CDCl3) δ: 152.1, 133.7, 132.1, 129.2, 128.7, 112.3, 106.2, 69.7, 59.5, 52
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+) 244.1099, found 244.1104.
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