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For preliminary communications, see: (a) Moritani, Y.; Ukita, T.; Nishitani, T.; Seki, M.; Iwasaki, T. Tetrahedron Lett. 1990, 31, 3615. (b) Moritani, Y.; Fukushima, C.; Ogiku, T., Ukita, T.; Miyagishima, T.; Iwasaki, T. Tetrahedron Lett. 1993, 34, 2787.
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For preliminary communications, see: (a) Moritani, Y.; Ukita, T.; Nishitani, T.; Seki, M.; Iwasaki, T. Tetrahedron Lett. 1990, 31, 3615. (b) Moritani, Y.; Fukushima, C.; Ogiku, T., Ukita, T.; Miyagishima, T.; Iwasaki, T. Tetrahedron Lett. 1993, 34, 2787.
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16044365216
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note
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Similar results were obtained when we calculated the heats of formation of the transition structure in the electrophilic addition of methyl iodide to the enolates of dibenzyl lactone using the AM1 or PM3 program.
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30
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37049111634
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36
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0026637882
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Ogiku, T.; Yoshida, S.; Takahashi, M.; Kuroda, T.; Ohmizu, H.; Iwasaki, T. Tetrahedron Lett. 1992, 33, 4473; 33, 4477.
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Tetrahedron Lett.
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37
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16044362060
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note
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1H NMR (NOE).
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38
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16044366162
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note
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16
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39
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37049103721
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Deuteriation probably takes place first on oxygen and the stereochemistry-determining step is the second deuteriation on carbon; Fleming, I.; Lewis, J. J. J. Chem. Soc., Chem. Commun. 1985, 149.
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(1985)
J. Chem. Soc., Chem. Commun.
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Fleming, I.1
Lewis, J.J.2
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40
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16044367672
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note
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Brown et al. reported the hydroxylation of the enolate of 1l-o with molecular hydrogen. However, the diastereoselectivity was not observed in this reaction, see ref 2c.
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41
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33947092680
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Vedejs, E.; Engler, D. A.; Telschow, J. E. J. Org. Chem. 1978, 43, 188.
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Vedejs, E.1
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Telschow, J.E.3
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42
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16044373293
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note
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The NMR spectra of the products (1a, 2c) obtained here were completely consistent with those of (±)-trachelogenin and (±)-guayadequiol reported in refs 1-3.
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43
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16044362493
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1H NMR.
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44
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16044374487
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note
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1H NMR.
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45
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16044372335
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note
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1H NME (NOE).
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46
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16044362564
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1H NMR.
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47
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0010084429
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QCPE No. 455
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MOPAC Ver. 5, J. J. P. Stewart, QCPE No. 455; Revised as Ver. 5.01 by T. Hirano, for UNIX machines, JCPE Newletter 1989, 1(2), 36.
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MOPAC Ver. 5
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Stewart, J.J.P.1
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JCPE Newletter
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TRIPOS, Inc., 1699 S. Hanley Road, St. Louis, MO 63144-2913
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TRIPOS, Inc., 1699 S. Hanley Road, St. Louis, MO 63144-2913.
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