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8744278020
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note
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Hexacyclinic acid numbering is used for both compounds.
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7
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8744248385
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Another strategy was reported by Clarke et al. in the synthesis of a model DEF-ring core of hexacyclinic acid: (a) Clarke, P. A.; Grist, M.; Ebden, M. Wilson, C. Chem. Commun. 2003, 1560. Roush et al. reported on a Morita-Baylis-Hillman approach for the formation of the C-ring of FR182877, which is closely related to the Michael aldol reaction: (b) Methot, J. L.; Roush, W. R Org. Lett. 2003, 5, 4223.
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Another strategy was reported by Clarke et al. in the synthesis of a model DEF-ring core of hexacyclinic acid: (a) Clarke, P. A.; Grist, M.; Ebden, M. Wilson, C. Chem. Commun. 2003, 1560. Roush et al. reported on a Morita-Baylis-Hillman approach for the formation of the C-ring of FR182877, which is closely related to the Michael aldol reaction: (b) Methot, J. L.; Roush, W. R Org. Lett. 2003, 5, 4223.
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8744290838
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note
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For example, treatment of ketone 15 with secondary amines like proline, pyrrolidine, or diethylamine did not give any reaction.
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18
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0000883511
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Ihara, M.; Taniguchi, T.; Makita, K.; Takano, M.; Ohnishi, M.; Taniguchu, N.; Fukumoto, K.; Kabuto, C. J. Am. Chem. Soc. 1993, 115, 8107.
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19
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2NH, see also: Sedrani, R.; Krallen, J.; Cabrejas, L. M. M.; Papageorgiou, C. D.; Senia, F.; Rohrbach, S.; Wagner, D.; Thai, B.; Eme, A.-M. J.; France, J.; Oberer, L.; Rihs, G.; Zenke, G.; Wagner, J. J. Am. Chem. Soc. 2003, 125, 3849.
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Thai, B.8
Eme, A.-M.J.9
France, J.10
Oberer, L.11
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Zenke, G.13
Wagner, J.14
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Meyer, S.W.1
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