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11
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0013593696
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note
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Unpublished results from this laboratory (manuscript in preparation). The 7-exo-trig free radical cyclization of acyclic precursors from sugars leading to chiral cycloheptanes is unprecedented.
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13
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0000582924
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Intramolecular 1,3-dipolar cycloaddition
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Trost, B. M.; Fleming, I.; Semmelhack, M. F., Eds.; Pergamon Press, Oxford, Chapter 4.10
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For a review on nitrone cycloadditions, see: Wade, P. A. Intramolecular 1,3-dipolar cycloaddition; in Comprehensive Organic Synthesis, Trost, B. M.; Fleming, I.; Semmelhack, M. F., Eds.; Pergamon Press, Oxford, 1991; Vol 4, Chapter 4.10, pp 1111.
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Wade, P.A.1
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14
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0000118768
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The intramolecular nitrone cycloaddition has been extensively analyzed and documented in sugar templates. For leading references: (a)
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The intramolecular nitrone cycloaddition has been extensively analyzed and documented in sugar templates. For leading references: (a) Torrente, S.; Noya, B.; Paredes, M. D.; Alonso, R. J. Org. Chem. 1997, 62, 6710;
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0030731022
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Mukhopadhyay, R.1
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0028786748
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(e) Hweson, A. T.; Jeffrey, J.; Szczur, N. Tetrahedron Lett. 1995, 36, 7731;
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Hweson, A.T.1
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0025318712
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(f) Collins, P. M.; Ashwood, M. S.; Eder, H. Tetrahedron Lett. 1990, 31, 2055;
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Collins, P.M.1
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23
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34848865414
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(a) Shing, T. K. M.; Elsley, D. A.; Gillhouley, J. G. J. Chem. Soc., Chem. Commun. 1989, 1280;
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25
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0013619754
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All new compounds showed excellent analytical and spectroscopic data
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All new compounds showed excellent analytical and spectroscopic data.
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26
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0013620160
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note
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2O/4:1, 0.2 M, 55 °C) to improve the yields of compounds 4 and 5 for the synthesis of the advanced intermediates 10 and 15, in order to compare their respective reactivity in the 1,3-DC reaction.
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27
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0013565635
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note
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The 60% yield in the synthesis of compound 7 from 6 was not optimized. In this reaction other more polar (probably mono and/or disubstituted methylated derivatives) were detected, but not isolated.
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28
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0013566089
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note
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2O]. This product was dissolved in chlorobenzene (3 mL) and refluxed (bath at 130 °C) for 20 h. The solvent was removed and the residue was submitted to chromatography (hexane: ethyl acetate, 1:3) to give adduct 16 (16 mg, 50%) as an oil.
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37049075844
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Shing, T. K. M.; Fung, W.-Ch.; Wong, Ch.-H. J. Chem. Soc., Chem. Commun. 1994, 449.
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Shing, T.K.M.1
Fung, W.-Ch.2
Wong, Ch.-H.3
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