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For example, a) G. Desimoni, G. Tacconi, Chem. Rev. 1975, 75, 651; b) D. L. Boger, S. M. Weinreb, Hetero Diels-Alder Methodology in Organic Synthesis. Academic Press, New York, 1987. c) L. F. Tietze, G. Kettschau in Stereoselective Heterocyclic Synthesis I, Vol. 189 (Ed.: P. Metz). Springer, Berlin, 1997, pp. 1-120.
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For example, a) D. L. Boger, K. D. Robarge, J. Org. Chem. 1988, 53, 3373; b) L. F. Tietze, C. Schneider, A. Grote, Chem. Eur. J. 1996, 2, 139; c) L. F. Tietze, C. Schneider, A. Montenbruck, Angew. Chem. 1994, 106, 1031; Angew. Chem. Int. Ed. Engl. 1994, 33, 980; d) B. B. Snider, Q. Zhang, J. Org. Chem. 1991, 56, 4908; e) L. F. Tietze, S. Brand, T. Pfeiffer, J. Antel, K. Harms, G. M. Sheldrick, J. Am. Chem. Soc. 1987, 109, 921; f) E. Wada, S. Kanemasa, O. Tsuge, Chem. Lett. 1989, 675.
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For example, a) D. L. Boger, K. D. Robarge, J. Org. Chem. 1988, 53, 3373; b) L. F. Tietze, C. Schneider, A. Grote, Chem. Eur. J. 1996, 2, 139; c) L. F. Tietze, C. Schneider, A. Montenbruck, Angew. Chem. 1994, 106, 1031; Angew. Chem. Int. Ed. Engl. 1994, 33, 980; d) B. B. Snider, Q. Zhang, J. Org. Chem. 1991, 56, 4908; e) L. F. Tietze, S. Brand, T. Pfeiffer, J. Antel, K. Harms, G. M. Sheldrick, J. Am. Chem. Soc. 1987, 109, 921; f) E. Wada, S. Kanemasa, O. Tsuge, Chem. Lett. 1989, 675.
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For example, a) D. L. Boger, K. D. Robarge, J. Org. Chem. 1988, 53, 3373; b) L. F. Tietze, C. Schneider, A. Grote, Chem. Eur. J. 1996, 2, 139; c) L. F. Tietze, C. Schneider, A. Montenbruck, Angew. Chem. 1994, 106, 1031; Angew. Chem. Int. Ed. Engl. 1994, 33, 980; d) B. B. Snider, Q. Zhang, J. Org. Chem. 1991, 56, 4908; e) L. F. Tietze, S. Brand, T. Pfeiffer, J. Antel, K. Harms, G. M. Sheldrick, J. Am. Chem. Soc. 1987, 109, 921; f) E. Wada, S. Kanemasa, O. Tsuge, Chem. Lett. 1989, 675.
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For example, a) D. L. Boger, K. D. Robarge, J. Org. Chem. 1988, 53, 3373; b) L. F. Tietze, C. Schneider, A. Grote, Chem. Eur. J. 1996, 2, 139; c) L. F. Tietze, C. Schneider, A. Montenbruck, Angew. Chem. 1994, 106, 1031; Angew. Chem. Int. Ed. Engl. 1994, 33, 980; d) B. B. Snider, Q. Zhang, J. Org. Chem. 1991, 56, 4908; e) L. F. Tietze, S. Brand, T. Pfeiffer, J. Antel, K. Harms, G. M. Sheldrick, J. Am. Chem. Soc. 1987, 109, 921; f) E. Wada, S. Kanemasa, O. Tsuge, Chem. Lett. 1989, 675.
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For example, a) D. L. Boger, K. D. Robarge, J. Org. Chem. 1988, 53, 3373; b) L. F. Tietze, C. Schneider, A. Grote, Chem. Eur. J. 1996, 2, 139; c) L. F. Tietze, C. Schneider, A. Montenbruck, Angew. Chem. 1994, 106, 1031; Angew. Chem. Int. Ed. Engl. 1994, 33, 980; d) B. B. Snider, Q. Zhang, J. Org. Chem. 1991, 56, 4908; e) L. F. Tietze, S. Brand, T. Pfeiffer, J. Antel, K. Harms, G. M. Sheldrick, J. Am. Chem. Soc. 1987, 109, 921; f) E. Wada, S. Kanemasa, O. Tsuge, Chem. Lett. 1989, 675.
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For example, a) D. L. Boger, K. D. Robarge, J. Org. Chem. 1988, 53, 3373; b) L. F. Tietze, C. Schneider, A. Grote, Chem. Eur. J. 1996, 2, 139; c) L. F. Tietze, C. Schneider, A. Montenbruck, Angew. Chem. 1994, 106, 1031; Angew. Chem. Int. Ed. Engl. 1994, 33, 980; d) B. B. Snider, Q. Zhang, J. Org. Chem. 1991, 56, 4908; e) L. F. Tietze, S. Brand, T. Pfeiffer, J. Antel, K. Harms, G. M. Sheldrick, J. Am. Chem. Soc. 1987, 109, 921; f) E. Wada, S. Kanemasa, O. Tsuge, Chem. Lett. 1989, 675.
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For example, a) G. Desimoni, G. Faita, P. P. Righetti, G. Tacconi, Tetrahedron 1991, 47, 8399; b) G. Desimoni, G. Faita, P. P. Righetti, L. Toma, Tetrahedron 1990, 46, 7951; c) A. Corsico Coda, G. Desimoni, G. Faita, P. P. Righetti, G. Tacconi, Tetrahedron 1989, 45, 775; d) M. A. Forman, W. P. Dailey, J. Am. Chem. Soc. 1991, 113, 2761.
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For example, a) G. Desimoni, G. Faita, P. P. Righetti, G. Tacconi, Tetrahedron 1991, 47, 8399; b) G. Desimoni, G. Faita, P. P. Righetti, L. Toma, Tetrahedron 1990, 46, 7951; c) A. Corsico Coda, G. Desimoni, G. Faita, P. P. Righetti, G. Tacconi, Tetrahedron 1989, 45, 775; d) M. A. Forman, W. P. Dailey, J. Am. Chem. Soc. 1991, 113, 2761.
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Desimoni, G.1
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For example, a) G. Desimoni, G. Faita, P. P. Righetti, G. Tacconi, Tetrahedron 1991, 47, 8399; b) G. Desimoni, G. Faita, P. P. Righetti, L. Toma, Tetrahedron 1990, 46, 7951; c) A. Corsico Coda, G. Desimoni, G. Faita, P. P. Righetti, G. Tacconi, Tetrahedron 1989, 45, 775; d) M. A. Forman, W. P. Dailey, J. Am. Chem. Soc. 1991, 113, 2761.
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Desimoni, G.2
Faita, G.3
Righetti, P.P.4
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For example, a) G. Desimoni, G. Faita, P. P. Righetti, G. Tacconi, Tetrahedron 1991, 47, 8399; b) G. Desimoni, G. Faita, P. P. Righetti, L. Toma, Tetrahedron 1990, 46, 7951; c) A. Corsico Coda, G. Desimoni, G. Faita, P. P. Righetti, G. Tacconi, Tetrahedron 1989, 45, 775; d) M. A. Forman, W. P. Dailey, J. Am. Chem. Soc. 1991, 113, 2761.
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For example, a) S. J. Johnson, C. Crasto, S. M. Hecht, Chem. Commun. 1998, 1019; b) G. Dujardin, S. Rossignol, E. Brown, Tetrahedron Lett. 1996, 37, 4007; c) G. Dujardin, S. Rossignol, E. Brown, Synthesis 1998, 763; d) R. R. Schmidt, M. Maier, Tetrahedron Lett. 1985, 26, 2065.
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For example, a) S. J. Johnson, C. Crasto, S. M. Hecht, Chem. Commun. 1998, 1019; b) G. Dujardin, S. Rossignol, E. Brown, Tetrahedron Lett. 1996, 37, 4007; c) G. Dujardin, S. Rossignol, E. Brown, Synthesis 1998, 763; d) R. R. Schmidt, M. Maier, Tetrahedron Lett. 1985, 26, 2065.
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We have previously observed similar change in induction with copper(II) bis(dihydrooxazole)s as catalysts for normal hetero-Diels - Alder reactions of aldehydes and ketones: M. Johannsen, K. A. Jørgensen, J. Org. Chem. 1995, 60, 5979; M. Johannsen, S. Yao, K. A. Joørgensen, Chem. Commun. 1997, 2169.
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We have previously observed similar change in induction with copper(II) bis(dihydrooxazole)s as catalysts for normal hetero-Diels - Alder reactions of aldehydes and ketones: M. Johannsen, K. A. Jørgensen, J. Org. Chem. 1995, 60, 5979; M. Johannsen, S. Yao, K. A. Joørgensen, Chem. Commun. 1997, 2169.
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[3a]
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[3a]
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