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24
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0013493222
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For additional conditions to effect these cyclizations, see references 8, 25-28
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24 For additional conditions to effect these cyclizations, see references 8, 25-28.
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25
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0013519832
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note
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2.
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31
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33947085552
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We have determined that this partial racemization occurs during the thiazole cyclization steps. A similar conclusion was described in ref. 11. Efforts toward finding improved reagents and/or conditions are in progress
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19F NMR. See: Dale, J. A.; Mosher, H. S. J. Am. Chem. Soc. 1973, 95, 512-519. We have determined that this partial racemization occurs during the thiazole cyclization steps. A similar conclusion was described in ref. 11. Efforts toward finding improved reagents and/or conditions are in progress.
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Dale, J.A.1
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32
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0013530648
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unpublished results
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32 J. L. Buchanan, unpublished results.
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Buchanan, J.L.1
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33
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0002067818
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and references cited therein
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33 Kaufman, T. S. Synlett 1997, 1377-1378 and references cited therein.
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Kaufman, T.S.1
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34
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0028213040
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and references cited therein
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34 Burke, S. D.; Piscopio, A. D.; Kort, M. E.; Matulenko, M. A.; Parker, M. H.; Armistead, D. M.; Shankaran, K. J. Org. Chem. 1994, 59, 332-347 and references cited therein.
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Shankaran, K.7
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35
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0013519948
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All compounds were purified to homogeneity and exhibited satisfactory analytical and spectroscopic properties
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35 All compounds were purified to homogeneity and exhibited satisfactory analytical and spectroscopic properties.
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36
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0013531166
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note
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+, 467.2368; found, 467.2347.
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37
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0013532821
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note
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+, 489.2212; found, 489.2198.
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