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O. Mitsunobu, Comprehensive Organic Synthesis (Eds.: B. M. Trost, I. Fleming), Pergamon: Oxford, 1991, vol. 6, p. 65-101.
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a) K. Marouka, H. Yamamoto, Comprehensive Organic Synthesis (Eds.: B. M. Trost, I. Fleming), Pergamon: Oxford, 1991, vol. 6, p. 763-793;
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Marouka, K.1
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b) T. Shioiri, Comprehensive Organic Synthesis (Eds.: B. M. Trost, I. Fleming), Pergamon: Oxford, 1991, vol. 6, p. 795-828.
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See, for example: a
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See, for example: a) J. Du Bois, C. S. Tomooka, J. Hong, E. M. Carreira, J. Am. Chem. Soc. 1997, 119, 3179-3180;
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M. Beller, C. Breindl, M. Eichberger, C. G. Hartung, J. Seayad, O. R. Thiel, A. Tillack, H. Trauthwein, Synlett 2002, 1579-1594.
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Beller, M.1
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Tillack, A.7
Trauthwein, H.8
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7
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37049092390
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See, for example: a
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See, for example: a) A. Varvoglis, Chem. Soc. Rev. 1981, 10, 377-407;
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0037078252
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a) M. T. Herrero, I. Tellitu, E. Domínguez, S. Hernández, I. Moreno, R. SanMartin, Tetrahedron 2002, 58, 8581-8589;
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Tetrahedron
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Herrero, M.T.1
Tellitu, I.2
Domínguez, E.3
Hernández, S.4
Moreno, I.5
SanMartin, R.6
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20
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0037064493
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b) M. T. Herrero, I. Tellitu, E. Domínguez, I. Moreno, R. SanMartin, Tetrahedron Lett. 2002, 43, 8273-8275;
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Tetrahedron Lett
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Herrero, M.T.1
Tellitu, I.2
Domínguez, E.3
Moreno, I.4
SanMartin, R.5
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21
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15444370706
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c) A. Correa, I. Tellitu, E. Dominguez, I. Moreno, R. SanMartin, J. Org. Chem. 2005, 70, 2256-2264.
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J. Org. Chem
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Correa, A.1
Tellitu, I.2
Dominguez, E.3
Moreno, I.4
SanMartin, R.5
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23
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33646240303
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For some reviews on nitrenium intermediates, see: a, Eds, R. A. Moss, M. S. Platz, M. Jones, Wiley-Interscience
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For some reviews on nitrenium intermediates, see: a) D. E. Falvey, Reactive Intermediate Chemistry (Eds.: R. A. Moss, M. S. Platz, M. Jones), Wiley-Interscience, 2004; p. 594-650;
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(2004)
Reactive Intermediate Chemistry
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Falvey, D.E.1
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25
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0037459842
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S. Serna, I. Tellitu, E. Domínguez, I. Moreno, R. SanMartin, Tetrahedron Lett. 2003, 44, 3483-3486.
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Tetrahedron Lett
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Serna, S.1
Tellitu, I.2
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Moreno, I.4
SanMartin, R.5
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26
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0037070584
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K. C. Nicolaou, P. S. Baran, Y.-L. Zhong, S. Barluenga, K. W. Hunt, R. Kranich, J. A. Vega, J. Am. Chem. Soc. 2002, 124, 2233-2244.
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J. Am. Chem. Soc
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Nicolaou, K.C.1
Baran, P.S.2
Zhong, Y.-L.3
Barluenga, S.4
Hunt, K.W.5
Kranich, R.6
Vega, J.A.7
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27
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26844576835
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For a recent review on amide bond formation, see
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For a recent review on amide bond formation, see: C. A. G. N. Montalbetti, V. Falque, Tetrahedron 2005, 61, 10827-10852.
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Tetrahedron
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Montalbetti, C.A.G.N.1
Falque, V.2
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28
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8344223641
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For the preparation and full structural characterization of amide 5g, see: M. Buswell, I. Fleming, U. Ghosh, S. Mack, M. Russell, B. P. Clark, Org. Biomol. Chem. 2004, 2, 3006-3017.
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For the preparation and full structural characterization of amide 5g, see: M. Buswell, I. Fleming, U. Ghosh, S. Mack, M. Russell, B. P. Clark, Org. Biomol. Chem. 2004, 2, 3006-3017.
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29
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0001158731
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It has been reported the beneficial behavior of BF3· OEt2 in biaryl coupling reactions promoted by PIFA. See, for example: a T. Takada, M. Arisawa, M. Gyoten, R. Hamda, H. Tohma, Y Kita, J. Org. Chem. 1998, 63, 7698-7706;
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2 in biaryl coupling reactions promoted by PIFA. See, for example: a) T. Takada, M. Arisawa, M. Gyoten, R. Hamda, H. Tohma, Y Kita, J. Org. Chem. 1998, 63, 7698-7706;
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30
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0002998144
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b) Y. Kita, M. Gyoten, M. Ohtsubo, H. Tohma, T. Takada, Chem. Commun. 1996, 1481-1482.
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Chem. Commun
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Kita, Y.1
Gyoten, M.2
Ohtsubo, M.3
Tohma, H.4
Takada, T.5
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31
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33846415944
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2, and it also resulted in complete degradation when attempts to prepare different derivatives (O-acetylation, O-tosylation, O-benzylation, and O-silylation) were carried out.
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2, and it also resulted in complete degradation when attempts to prepare different derivatives (O-acetylation, O-tosylation, O-benzylation, and O-silylation) were carried out.
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32
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33846455949
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13C NMR, an additional HMBC experiment was carried out to confirm the identity of pyrrolidine 6a and, hence, to exclude the formation of 6a′.
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13C NMR, an additional HMBC experiment was carried out to confirm the identity of pyrrolidine 6a and, hence, to exclude the formation of 6a′.
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-
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33
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0043190538
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Arylnitrenium intermediates are known to capture water an alcohols easily. See, for example: a P. G. Gassman, G. A. Campbell, J. Am. Chem. Soc. 1972, 94, 3891-3896;
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Arylnitrenium intermediates are known to capture water an alcohols easily. See, for example: a) P. G. Gassman, G. A. Campbell, J. Am. Chem. Soc. 1972, 94, 3891-3896;
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34
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0000248505
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b) M. Novak, M. J. Kahley, J. Lin, S. A. Kennedy, L. A. Swanegan, J. Am. Chem. Soc. 1994, 116, 11626-11627;
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J. Am. Chem. Soc
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Novak, M.1
Kahley, M.J.2
Lin, J.3
Kennedy, S.A.4
Swanegan, L.A.5
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36
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33846461812
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The EPR studies of different radical cations generated by PIFA from aromatic compounds have also been carried out. See, for example: a L. Eberson, M. P. Hartshorn, O. Persson, Acta Chem. Scand. 1995, 49, 640-644;
-
The EPR studies of different radical cations generated by PIFA from aromatic compounds have also been carried out. See, for example: a) L. Eberson, M. P. Hartshorn, O. Persson, Acta Chem. Scand. 1995, 49, 640-644;
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37
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0001284394
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Y. Kita, H. Tohma, K. Hatanaka, T. Takada, S. Fujita, S. Mitoh, H. Sakurai, S. Oka, J. Am. Chem. Soc. 1994, 116, 3684-3691. Although highly desirable, an EPR spectrum of the reaction mixture of 5a with PIFA in trifluoroethanol was impossible to be recorded due to the high polarity of this solvent.
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b) Y. Kita, H. Tohma, K. Hatanaka, T. Takada, S. Fujita, S. Mitoh, H. Sakurai, S. Oka, J. Am. Chem. Soc. 1994, 116, 3684-3691. Although highly desirable, an EPR spectrum of the reaction mixture of 5a with PIFA in trifluoroethanol was impossible to be recorded due to the high polarity of this solvent.
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38
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0000245898
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a) R. Sutcliffe, D. Griller, J. Lessard, K. U. Ingold, J. Am. Chem. Soc. 1981, 103, 624-628;
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J. Am. Chem. Soc
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Sutcliffe, R.1
Griller, D.2
Lessard, J.3
Ingold, K.U.4
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40
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0037458796
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and references therein
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c) Y. Miura, Y. Oyama, Y. Teki, J. Org. Chem. 2003, 68, 1225-1234, and references therein.
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J. Org. Chem
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Miura, Y.1
Oyama, Y.2
Teki, Y.3
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41
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33846411956
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For the shake of clarity only PMP-substituted amides, 5a and 5c, are selected to illustrate the mechanism, which equally applies to amides 5b,d;
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a) For the shake of clarity only PMP-substituted amides, 5a and 5c, are selected to illustrate the mechanism, which equally applies to amides 5b,d;
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-
-
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42
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33846451510
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A direct transformation from D to G can be ruled out on the basis that it would not explain the actual necessity of an aryl-donating group at nitrogen;
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b) A direct transformation from D to G can be ruled out on the basis that it would not explain the actual necessity of an aryl-donating group at nitrogen;
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43
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33846464742
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[27]
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[27]
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44
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0000853458
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For related processes, see
-
For related processes, see: H. Takahata, T. Suzuki, M. Maruyama, K. Moriyama, M. Mozumi, T. Takamatsu, T. Yamazaki, Tetrahedron 1988, 44, 4777-4786.
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(1988)
Tetrahedron
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-
Takahata, H.1
Suzuki, T.2
Maruyama, M.3
Moriyama, K.4
Mozumi, M.5
Takamatsu, T.6
Yamazaki, T.7
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45
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33846456356
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-
For the synthesis of 7c and 7i, see: H. Hoberg, Y. Peres, C. Krueger, Y. H. Tsay, Angew. Chem. 1987, 99, 799-800;
-
a) For the synthesis of 7c and 7i, see: H. Hoberg, Y. Peres, C. Krueger, Y. H. Tsay, Angew. Chem. 1987, 99, 799-800;
-
-
-
-
46
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0033730313
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For 7e, see: D. Cermak, D. Wiemer, K. Lewis, R. Hohl, Bioorg. Med. Chem. 2000, 8, 2729-2737;
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b) For 7e, see: D. Cermak, D. Wiemer, K. Lewis, R. Hohl, Bioorg. Med. Chem. 2000, 8, 2729-2737;
-
-
-
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47
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0031864696
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For 7f, see: D. H. Kim, Z.-H. Li, S. S. Lee, J. Park, S. J. Chung, Bioorg. Med. Chem. 1998, 6, 239-249.
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c) For 7f, see: D. H. Kim, Z.-H. Li, S. S. Lee, J. Park, S. J. Chung, Bioorg. Med. Chem. 1998, 6, 239-249.
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-
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48
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0021018417
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M. Mori, Y. Washioka, T. Urayama, K. Yoshiura, K. Chiba, Y. Ban, J. Org. Chem. 1983, 48, 4058-4067.
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J. Org. Chem
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Mori, M.1
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Urayama, T.3
Yoshiura, K.4
Chiba, K.5
Ban, Y.6
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49
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33846412723
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-
See ref.[12
-
[12]
-
-
-
-
50
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33846421342
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-
NOE experiments were conducted on pyrrolidine 9g to confirm an anti relative configuration between substituents at 2-and 4-positions;
-
a) NOE experiments were conducted on pyrrolidine 9g to confirm an anti relative configuration between substituents at 2-and 4-positions;
-
-
-
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51
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0034602983
-
-
Complete absence of diastereocontrol was also observed in the reaction of a related compound of type 8b (R, NHPh) under a radical process mediated by IBX. K. C. Nicolaou, Y.-L. Zhong, P. S. Baran, Angew. Chem. Int. Ed. 2000, 39, 625-628;
-
b) Complete absence of diastereocontrol was also observed in the reaction of a related compound of type 8b (R = NHPh) under a radical process mediated by IBX. K. C. Nicolaou, Y.-L. Zhong, P. S. Baran, Angew. Chem. Int. Ed. 2000, 39, 625-628;
-
-
-
-
52
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4143069529
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-
Pyrrolidinone 9f has been previously prepared. It is also included here for comparative purposes: S. Serna, I. Tellitu, E. Domínguez, I. Moreno, R. SanMartin, Tetrahedron 2004, 60, 6533-6539;
-
c) Pyrrolidinone 9f has been previously prepared. It is also included here for comparative purposes: S. Serna, I. Tellitu, E. Domínguez, I. Moreno, R. SanMartin, Tetrahedron 2004, 60, 6533-6539;
-
-
-
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53
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33846453686
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Diastereomeric ratio calculations were conducted by comparison of intensities of selected and isolated signals in 1H NMR spectroscopy
-
1H NMR spectroscopy.
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54
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30744447707
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Conversely, N-aryl-5,5-diphenyl-4-pentenamidyl radicals cyclize to yield the corresponding pyrrolidinones. See: E. Martínez II, M. Newcomb, J. Org. Chem. 2006, 71, 557-561.
-
Conversely, N-aryl-5,5-diphenyl-4-pentenamidyl radicals cyclize to yield the corresponding pyrrolidinones. See: E. Martínez II, M. Newcomb, J. Org. Chem. 2006, 71, 557-561.
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-
-
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55
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0141854098
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A related process of lactonization with phenonium ion participation has been published. See
-
A related process of lactonization with phenonium ion participation has been published. See: A. C. Boye, D. Meyer, C. K. Inglson, A. N. French, T. Wirth, Org. Lett. 2003, 5, 2157-2159.
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Org. Lett
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Boye, A.C.1
Meyer, D.2
Inglson, C.K.3
French, A.N.4
Wirth, T.5
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56
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0037158212
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See, for example: a
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See, for example: a) S. Nagumo, Y. Ishii, Y. Kakimoto, N. Kawahara, Tetrahedron Lett. 2002, 43, 5333-5337;
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Nagumo, S.1
Ishii, Y.2
Kakimoto, Y.3
Kawahara, N.4
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57
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0037144642
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b) S. Nagumo, M. Ono, Y. Kakimoto, T. Furukawa, T. Hisano, M. Mizukami, N. Kawahara, H. Akita, J. Org. Chem. 2002, 67, 6618-6622.
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J. Org. Chem
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Nagumo, S.1
Ono, M.2
Kakimoto, Y.3
Furukawa, T.4
Hisano, T.5
Mizukami, M.6
Kawahara, N.7
Akita, H.8
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58
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0033616106
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C. H. Larsen, B. H. Ridgway, J. T. Shaw, K. A. Woerpel, J. Am. Chem. Soc. 1999, 121, 12208-12209.
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J. Am. Chem. Soc
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Larsen, C.H.1
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Woerpel, K.A.4
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