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10
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0142074733
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For a useful review of tandem reactions initiated by organolithium species, see
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For a useful review of tandem reactions initiated by organolithium species, see: García, G. V.; Nudelman, N. S. Org. Prep. Proced. Int. 2003, 35, 445-500
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33751499793
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For an alternative approach to medium-sized rings from butadiene sulfone, see
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For an alternative approach to medium-sized rings from butadiene sulfone, see: Chou, T.; Chang, C.-Y. J. Org. Chem. 1991, 56, 4560-4563
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13
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0029047514
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For other reports of vinylogous additions from butadiene sulfone, see
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For other reports of vinylogous additions from butadiene sulfone, see: Chou, T.; Tseng, H.-J. Tetrahedron Lett. 1995, 36, 7105-7108
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Chou, T.; Tso, H.-H.; Tao, Y.-T.; Lin, L. C. J. Org. Chem. 1987, 52, 244-246
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For reviews of the anionic oxy-Cope reaction, see
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For reviews of the anionic oxy-Cope reaction, see: Paquette, L. A. Tetrahedron 1997, 53, 13971-14020
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Paquette, L.A.1
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0000746177
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In;;, Eds.; Permagon Press: Oxford, UK,; Vol., Chapter 7.1
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Hill, R. K. In Comprehensive Organic Synthesis; Trost, B. M.; Fleming, I., Eds.; Permagon Press: Oxford, UK, 1991; Vol. 5, Chapter 7.1.
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Hill, R.K.1
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0000256044
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For other examples of tandem ketone-addition/anionic oxy-Cope reactions, see
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For other examples of tandem ketone-addition/anionic oxy-Cope reactions, see: MacDougall, J. M.; Santora, V. J.; Verma, S. K.; Turnbull, P.; Hernandez, C. R.; Moore, H. W. J. Org. Chem. 1998, 63, 6905-6913
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0001014859
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21
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77956498584
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-
note
-
Treatment of 1 and 2 with LiHMDS for extended periods did not result in the direct formation of 6, suggesting that the enolate formed following the anionic oxy-Cope is not able to deprotonate the sulfone moiety.
-
-
-
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22
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77956508981
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These data can be obtained free of charge from the Cambridge Crystallographic Data Centre, 12 Union Rd., Cambridge CB2 1EZ, UK or via
-
Supplementary crystallographic data for compounds 6 and 9 have been deposited with the Cambridge Crystallographic Data Centre; deposition nos. 766248 and 766249. These data can be obtained free of charge from the Cambridge Crystallographic Data Centre, 12 Union Rd., Cambridge CB2 1EZ, UK or via www.ccdc.cam.ac.uk/conts/retrieving.html.
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23
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0344430089
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For a similar treatment of a different system, see
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For a similar treatment of a different system, see: White, B. H.; Snapper, M. L. J. Am. Chem. Soc. 2003, 125, 14901-14904
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White, B.H.1
Snapper, M.L.2
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0001940234
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Chair-shaped transition states generally predominate in [3,3]-sigmatropic rearrangements of acyclic substrates. See: Doering, W. von E.; Roth, W. R. Tetrahedron 1962, 18, 67-74 However, conformational constraints in cyclic substrates can lead to a preference for boat-shaped transition states. See ref 8a for a more extensive discussion.
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Doering, W.V.E.1
Roth, W.R.2
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25
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0034728122
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For other examples of chelation-controlled anionic oxy-Cope reactions, see
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For other examples of chelation-controlled anionic oxy-Cope reactions, see: Rutherford, A. P.; Hartley, R. C. Tetrahedron Lett. 2000, 41, 737-741
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Seki, K.; Tooya, M.; Sato, T.; Ueno, M.; Uyehara, T. Tetrahedron Lett. 1998, 39, 8673-8676
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27
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0005220841
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Alkoxides become increasingly dissociated from their metal counterions moving down the series Li < Na < K. See:;, For the effect of 18-crown-6 see refs 7 and 8
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Alkoxides become increasingly dissociated from their metal counterions moving down the series Li < Na < K. See: Msayib, K. J.; Watt, C. I. F. Chem. Soc. Rev. 1992, 21, 237-243 For the effect of 18-crown-6 see refs 7 and 8.
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37049129451
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For other conjugate additions to isomerized butadiene sulfones, see
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For other conjugate additions to isomerized butadiene sulfones, see: Argyle, C. S.; Goadby, S. C.; Mason, K. G.; Reed, R. A.; Smith, M. A.; Stern, E. S. J. Chem. Soc. (C) 1967, 2156-2170
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Bal, B. S.; Childers, W. E.; Pinnick, H. W. Tetrahedron 1981, 37, 2091-2096
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