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0000327520
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(a) Brengel, G. P.; Rithner, C.; Meyers, A. I. J. Org. Chem. 1994, 59, 5144-5146.
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20
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0001092386
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Other annulation pathways are also possible. For [2 + 2] annulations, see: (a) Akiyama, T.; Kirino, M. Chem. Lett. 1995, 723-724.
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33748231662
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22
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0033520733
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(b) Knölker, H.-J.; Baum, G.; Graf, R. Angew. Chem., Int. Ed. Engl. 1994, 33, 1612-1615. For a formal [4 + 2] annulation, see: Angle, S. R.; El-Said, N. A. J. Am. Chem. Soc. 1999, 121, 10211-10212.
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26
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0002437012
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JAI: Greenwich, CT
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Tamao, K.1
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31
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85088716232
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note
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13C NMR) obtained for 4 were identical to those reported by Knölker and Meyers (refs 2c and 5c).
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32
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0344887064
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The benzhydryl group was expected to be as good a leaving group as the trityl group because they have comparable basicities: Bordwell, F. G. Acc. Chem. Res. 1988, 21, 456-463.
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Bordwell, F.G.1
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33
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0001318937
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A recent work has shown that the benzylsilyl group can also be oxidized to a hydroxy group with the same procedure: Miura, K.; Hondo, T.; Nakagawa, T.; Takahashi, T.; Hosomi, A. Org. Lett. 2000, 2, 385-388.
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Hosomi, A.5
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34
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0000782113
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For example, see: Boons, G. J. P. H.; van der Marel, G. A.; van Boom, J. H. Tetrahedron Lett. 1989, 30, 229-232.
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Boons, G.J.P.H.1
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Van Boom, J.H.3
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35
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0000078443
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Murakami, M.; Suginome, M.; Fujimoto, K.; Nakamura, H.; Anderson, P. G.; Ito, Y. J. Am. Chem. Soc. 1993, 115, 6487-6498.
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Anderson, P.G.5
Ito, Y.6
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36
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0042248730
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The β-elimination product 22 was obtained in 81% yield. (Matrix Presented)
-
The β-elimination product 22 was obtained in 81% yield. (Matrix Presented)
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37
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37049088928
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(a) Fleming, I.; Henning, R.; Parker, D. C.; Plaut, H. E.; Sanderson, P. E. J. J. Chem. Soc., Perkin Trans. 1 1995, 317-337.
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Fleming, I.1
Henning, R.2
Parker, D.C.3
Plaut, H.E.4
Sanderson, P.E.J.5
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39
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85088715416
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E′ pathway through an antiperiplanar transition state. See refs 1 and 6a,b
-
E′ pathway through an antiperiplanar transition state. See refs 1 and 6a,b.
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