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6
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17
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33744476198
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Werner S., Iyer P.S., Fodor M.D., Coleman C.M., Twining L.A., Mitasev B., and Brummond K.M. J. Comb. Chem. 8 (2006) 368
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Mitasev, B.6
Brummond, K.M.7
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23
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0037073206
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-
For example, Fallis' methodology was applied by Schreiber and coworkers to the diversity-oriented synthesis of a library of polycyclic small molecules:. For other applications of heteroatom containing cross-conjugated trienes, see
-
For example, Fallis' methodology was applied by Schreiber and coworkers to the diversity-oriented synthesis of a library of polycyclic small molecules:. Kwon O., Park S.B., and Schreiber S.L. For other applications of heteroatom containing cross-conjugated trienes, see. J. Am. Chem. Soc. 124 (2002) 13402
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Kwon, O.1
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Schreiber, S.L.3
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26
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33947697969
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K. M. Brummond, T. O. Painter, D. A. Probst, B. Mitasev, "Rh(l)-Catalyzed Allenic Carbocyclization Reaction Affording 6- and c-Lactams"" Submitted for publication.
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27
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33947661535
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note
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The structure of 22a was assigned based on an X-ray of a later intermediate, Diels-Alder product (23a).
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-
-
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28
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33947704245
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-
note
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Best yields were obtained when all three reactions were performed without intermediate purification. See experimental section for details.
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29
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0013610070
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For the unexpected formation of a similar oxazolidinone
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For the unexpected formation of a similar oxazolidinone. Granier T., and Vasella A. Helv. Chim. Acta. 81 (1998) 865
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Granier, T.1
Vasella, A.2
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30
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33947641166
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note
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Reactions were run until all starting material was consumed. No byproducts were isolated.
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31
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33947641679
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note
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Reaction was also not observed with the following dienophiles: 2-cyclohexene, 2-cyclopentene, acrolein and methyl-vinyl ketone.
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-
-
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32
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0006243257
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Tacconi G., ladarola P., Marinone F., Righetti P.P., and Desimoni G. Tetrahedron 31 (1975) 1179
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Tacconi, G.1
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Desimoni, G.5
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33
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4444347862
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Rudnichenko A.V., Timoshenko V.M., Chernega A.N., Nesterenko A.M., and Shermolovich Y.G. J. Fluorine Chem. 125 (2004) 1351
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Rudnichenko, A.V.1
Timoshenko, V.M.2
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34
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37049071017
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Burdisso M., Desimoni G., Faita G., Righetti P., and Tacconi G. J. Chem. Soc., Perkin Trans. 7 2 (1989) 845
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Burdisso, M.1
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Tacconi, G.5
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35
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33845552460
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3 to catalyze hetero Diels-Alder reactions, see
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3 to catalyze hetero Diels-Alder reactions, see. Bednarski M., and Danishefsky S. J. Am. Chem. Soc. 105 (1983) 3716
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Bednarski, M.1
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37
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12344257598
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Hughes K.D., Nguyen T.-L.N., Dyckman D., Dulay D., Boyko W.J., and Giuliano R.M. Tetrahedron: Asymmetry 16 (2005) 273
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Hughes, K.D.1
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Giuliano, R.M.6
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41
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0026334003
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Mandai T., Suzuki S., Ikawa A., Murakami T., Kawada M., and Tsuji J. Tetrahedron Lett. 32 (1991) 7687
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42
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33751158290
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For Ag(l)-catalyzed cycization of allenic acids, see
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For Ag(l)-catalyzed cycization of allenic acids, see. Marshall J.A., Wolf M.A., and Wallace E.M. J. Org. Chem. 59 (1994) 7169
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Marshall, J.A.1
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45
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33947661534
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note
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Recently, a comprehensive study examined the effects contributing to the observed stereochemistry for thermal and Lewis acid catalyzed reactions of relatively unfunctionalized hexadienyl-acrylates. (a) E. L. Pearson, L. C. H. Kwan, C. I. Turner, G. A. Jones, A. C. Willis, M. N. Paddon-Row, and M. S. Sherburn, J. Org. Chem., 2006, 71, 6099. In general, difficulties associated with Diels-Alder reactions of ester-tethered substrates are attributed to existence of the ester moiety in an unfavorable transoid conformation in order to minimize repulsive dipole interactions. For a successful Diels-Alder reaction, the ester needs to rotate into a less favorable cisoid conformation that results in increase of the net dipole moment and steric repulsion between the two alkyl groups. (b) P. Deslongchamps, Stereoelectronic Effects in Organic Chemistry; Pergamon: Oxford, 1983; 54-100. Earlier studies have unveiled a dramatic solvent effect on the ester tethered Diels-Alder reaction. (c) M. E. Jung and J. Gervay, J. Am. Chem. Soc., 1989, 111, 5469.
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50
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33947636191
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note
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Highest yield (50%) of the tricyclic lactone (34) was obtained when the reaction was performed at lower concentrations (0.01M), suggesting that side reactions may be responsible for the low yield (mass spectral analysis of the reaction mixture suggested the presence of dimeric products possibly arising from a Diels-Alder reaction of the more reactive diene in the product with an acrylic ester moiety from a molecule of unreacted starting material). Personal communication from Dr. Stefan Werner.
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51
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0001519441
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Ball G.E., Cullen W.R., Fryzuk M.D., James B.R., and Rettig S.J. Organometallics 10 (1991) 3767
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0001400822
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Castelhano A.L., Home S., Taylor G.J., Billedeau R., and Krantz A. Tetrahedron 44 (1988) 5451
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Castelhano, A.L.1
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Krantz, A.5
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