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For reviews, see: (a) de Koning, H.; Speckamp, W. N. In Stereoselective Synthesis [Houben-Weyl], Helmchen, G.; Hoffmann, R. W.; Muzler, J.; Schaumann, E., Eds.; Thieme: Stuttgart, 1996, Workbench ed. E21, Vol. 3, 1952-2010; (b) See also Ref. 1.
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For some recent examples, see: (a) Luker, T.; Koot, W.-J.; Hiemstra, H.; Speckamp, W. N. J. Org. Chem. 1998, 63, 220-221; (b) Padwa, A.; Heidelbaugh, T. M.; Kuethe, J. T.; McClure, M. S. J. Org. Chem. 1998, 63, 6778-6779; (c) Lee, Y. S.; Lee, J. Y.; Kim, D. W.; Park, H. Tetrahedron 1999, 55, 4631-4636; (d) Lee, Y. S.; Cho, D. J.; Kim, S. N.; Choi, J. H.; Park, H. J. Org. Chem. 1999, 64, 9727-9730. (e) Ducrot, P.; Thal, C. Tetrahedron Lett. 1999, 40, 9037-9040; (f) Consonni, A.; Danieli, B.; Lesma, G.; Passarella, D.; Piacenti, P.; Silvani, A. Eur. J. Org. Chem. 2001, 1373-1383; (g) Padwa, A. Pure Appl. Chem. 2003, 75, 47-62.
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For some recent examples, see: (a) Luker, T.; Koot, W.-J.; Hiemstra, H.; Speckamp, W. N. J. Org. Chem. 1998, 63, 220-221; (b) Padwa, A.; Heidelbaugh, T. M.; Kuethe, J. T.; McClure, M. S. J. Org. Chem. 1998, 63, 6778-6779; (c) Lee, Y. S.; Lee, J. Y.; Kim, D. W.; Park, H. Tetrahedron 1999, 55, 4631-4636; (d) Lee, Y. S.; Cho, D. J.; Kim, S. N.; Choi, J. H.; Park, H. J. Org. Chem. 1999, 64, 9727-9730. (e) Ducrot, P.; Thal, C. Tetrahedron Lett. 1999, 40, 9037-9040; (f) Consonni, A.; Danieli, B.; Lesma, G.; Passarella, D.; Piacenti, P.; Silvani, A. Eur. J. Org. Chem. 2001, 1373-1383; (g) Padwa, A. Pure Appl. Chem. 2003, 75, 47-62.
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For some recent examples, see: (a) Luker, T.; Koot, W.-J.; Hiemstra, H.; Speckamp, W. N. J. Org. Chem. 1998, 63, 220-221; (b) Padwa, A.; Heidelbaugh, T. M.; Kuethe, J. T.; McClure, M. S. J. Org. Chem. 1998, 63, 6778-6779; (c) Lee, Y. S.; Lee, J. Y.; Kim, D. W.; Park, H. Tetrahedron 1999, 55, 4631-4636; (d) Lee, Y. S.; Cho, D. J.; Kim, S. N.; Choi, J. H.; Park, H. J. Org. Chem. 1999, 64, 9727-9730. (e) Ducrot, P.; Thal, C. Tetrahedron Lett. 1999, 40, 9037-9040; (f) Consonni, A.; Danieli, B.; Lesma, G.; Passarella, D.; Piacenti, P.; Silvani, A. Eur. J. Org. Chem. 2001, 1373-1383; (g) Padwa, A. Pure Appl. Chem. 2003, 75, 47-62.
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For some recent examples, see: (a) Luker, T.; Koot, W.-J.; Hiemstra, H.; Speckamp, W. N. J. Org. Chem. 1998, 63, 220-221; (b) Padwa, A.; Heidelbaugh, T. M.; Kuethe, J. T.; McClure, M. S. J. Org. Chem. 1998, 63, 6778-6779; (c) Lee, Y. S.; Lee, J. Y.; Kim, D. W.; Park, H. Tetrahedron 1999, 55, 4631-4636; (d) Lee, Y. S.; Cho, D. J.; Kim, S. N.; Choi, J. H.; Park, H. J. Org. Chem. 1999, 64, 9727-9730. (e) Ducrot, P.; Thal, C. Tetrahedron Lett. 1999, 40, 9037-9040; (f) Consonni, A.; Danieli, B.; Lesma, G.; Passarella, D.; Piacenti, P.; Silvani, A. Eur. J. Org. Chem. 2001, 1373-1383; (g) Padwa, A. Pure Appl. Chem. 2003, 75, 47-62.
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For some recent examples, see: (a) Luker, T.; Koot, W.-J.; Hiemstra, H.; Speckamp, W. N. J. Org. Chem. 1998, 63, 220-221; (b) Padwa, A.; Heidelbaugh, T. M.; Kuethe, J. T.; McClure, M. S. J. Org. Chem. 1998, 63, 6778-6779; (c) Lee, Y. S.; Lee, J. Y.; Kim, D. W.; Park, H. Tetrahedron 1999, 55, 4631-4636; (d) Lee, Y. S.; Cho, D. J.; Kim, S. N.; Choi, J. H.; Park, H. J. Org. Chem. 1999, 64, 9727-9730. (e) Ducrot, P.; Thal, C. Tetrahedron Lett. 1999, 40, 9037-9040; (f) Consonni, A.; Danieli, B.; Lesma, G.; Passarella, D.; Piacenti, P.; Silvani, A. Eur. J. Org. Chem. 2001, 1373-1383; (g) Padwa, A. Pure Appl. Chem. 2003, 75, 47-62.
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For some recent examples, see: (a) Luker, T.; Koot, W.-J.; Hiemstra, H.; Speckamp, W. N. J. Org. Chem. 1998, 63, 220-221; (b) Padwa, A.; Heidelbaugh, T. M.; Kuethe, J. T.; McClure, M. S. J. Org. Chem. 1998, 63, 6778-6779; (c) Lee, Y. S.; Lee, J. Y.; Kim, D. W.; Park, H. Tetrahedron 1999, 55, 4631-4636; (d) Lee, Y. S.; Cho, D. J.; Kim, S. N.; Choi, J. H.; Park, H. J. Org. Chem. 1999, 64, 9727-9730. (e) Ducrot, P.; Thal, C. Tetrahedron Lett. 1999, 40, 9037-9040; (f) Consonni, A.; Danieli, B.; Lesma, G.; Passarella, D.; Piacenti, P.; Silvani, A. Eur. J. Org. Chem. 2001, 1373-1383; (g) Padwa, A. Pure Appl. Chem. 2003, 75, 47-62.
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For some representative examples, see: (a) Speckamp, W. N. Rec. Trav. Chim. Pays-Bas. 1981, 345-354; (b) Maryanoff, B. E.; McComsey, D. F.; Duhl-Emswiler, B. A. J. Org. Chem. 1983, 48, 5062-5074; (c) Kano, S.; Yuasa, Y. ; Yokomatsu, T.; Shibuya, S. J. Org. Chem. 1983, 48, 3835-3837; (d) Maryanoff, B. E.; McComsey, D. F.; Almond, H. R., Jr.; Mutter, M. S. J. Org. Chem. 1986, 51, 1341-1346; (e) Ent, H.; Koning, H.; Speckamp, W. N. Heterocycles 1988, 27, 237-243; (f) Bahajaj, A. A.; Vernon, J. M.; Wilson, G. D. J. Chem. Soc. Perkin Trans. 2001, 1446-1451; (g) Katritzky, A. R.; Mehta, S.; He, H.-Y. J. Org. Chem. 2001, 66, 148-152.
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For some representative examples, see: (a) Speckamp, W. N. Rec. Trav. Chim. Pays-Bas. 1981, 345-354; (b) Maryanoff, B. E.; McComsey, D. F.; Duhl-Emswiler, B. A. J. Org. Chem. 1983, 48, 5062-5074; (c) Kano, S.; Yuasa, Y. ; Yokomatsu, T.; Shibuya, S. J. Org. Chem. 1983, 48, 3835-3837; (d) Maryanoff, B. E.; McComsey, D. F.; Almond, H. R., Jr.; Mutter, M. S. J. Org. Chem. 1986, 51, 1341-1346; (e) Ent, H.; Koning, H.; Speckamp, W. N. Heterocycles 1988, 27, 237-243; (f) Bahajaj, A. A.; Vernon, J. M.; Wilson, G. D. J. Chem. Soc. Perkin Trans. 2001, 1446-1451; (g) Katritzky, A. R.; Mehta, S.; He, H.-Y. J. Org. Chem. 2001, 66, 148-152.
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85031054315
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Groningen, The Netherlands, July 13-18, see book of abstracts: communication P2-160
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This work was presented in part at the 12th European Symposium on Organic Chemistry (ESOC-12), Groningen, The Netherlands, July 13-18, 2001, see book of abstracts: communication P2-160.
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12th European Symposium on Organic Chemistry (ESOC-12)
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38
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85031061864
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note
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+, 29), 256 (19), 255 (100), 252 (16), 239 (15), 237 (21), 223 (15), 183 (13), 182 (12), 150 (11), 149 (83), 168 (14), 167 (44), 130 (10), 113 (13), 112 (10), 83 (13), 71 (34), 70 (22), 69 (13), 57 (51), 56 (11), 55 (30).
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39
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85031063614
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1H NMR. The J values of the ABX system formed by H-5 and H-6 protons indicate that H-5 is in a pseudo-axial position. Besides, NOE difference spectroscopy showed an enhancement between H-5 and the methyl protons on C-11b.
-
1H NMR. The J values of the ABX system formed by H-5 and H-6 protons indicate that H-5 is in a pseudo-axial position. Besides, NOE difference spectroscopy showed an enhancement between H-5 and the methyl protons on C-11b.
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