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a) For a recent account of the stereochemistry of this kind of reaction, see: G. Bellucci, C. Chiappe, F. D'Andrea, G. Lo Moro, Tetrahedron 1997, 53, 3417-3424;
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c) α-aminoazides are useful iminium ion precursors, see: P. Magnus, J. Lacour, W. Weber, Synthesis 1998, 547-551 and references therein.
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d)See also: R. Bishop, in Comprehensive Organic Synthesis, Vol. 6 (Eds.: B. M. Trost, I. Fleming), Pergamon, Oxford, 1991, pp. 261-300.
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Among them: 2-hydroxy-3-iodotetrahydropyridines, 3-substituted 5-formyl-1-methylpyrroles, and tetrahydropyridine dimers. For the formation and characterization of these compounds, see ref. [3a].
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For a general review of olefin amination reactions promoted by electrophiles, see: a) M. Orena in Methods of Organic Chemistry, Stereoselective Synthesis, Vol. 9 (Eds.: G. Helmchen, R. W. Hoffmann, J. Mulzer, E. Schaumann), Thieme, Stuttgart, 1996, pp. 5291-5355. Only intramolecular haloamination of olefins is relevant in synthesis, see inter alia: b) D. R. Williams, D. L. Brown, J. W. Benbow, J. Am. Chem. Soc. 1989, 111, 1923-1925; c) D. Tanner, M. Sellén, J. E. Bäckvall, J. Org. Chem. 1989, 54, 3374-3378; d) W. R. Bowman, D. L. Clark, R. J. Marmon, Tetrahedron 1994, 50, 1275-1294.
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Orena, F.M.1
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For a general review of olefin amination reactions promoted by electrophiles, see: a) M. Orena in Methods of Organic Chemistry, Stereoselective Synthesis, Vol. 9 (Eds.: G. Helmchen, R. W. Hoffmann, J. Mulzer, E. Schaumann), Thieme, Stuttgart, 1996, pp. 5291-5355. Only intramolecular haloamination of olefins is relevant in synthesis, see inter alia: b) D. R. Williams, D. L. Brown, J. W. Benbow, J. Am. Chem. Soc. 1989, 111, 1923-1925; c) D. Tanner, M. Sellén, J. E. Bäckvall, J. Org. Chem. 1989, 54, 3374-3378; d) W. R. Bowman, D. L. Clark, R. J. Marmon, Tetrahedron 1994, 50, 1275-1294.
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For a general review of olefin amination reactions promoted by electrophiles, see: a) M. Orena in Methods of Organic Chemistry, Stereoselective Synthesis, Vol. 9 (Eds.: G. Helmchen, R. W. Hoffmann, J. Mulzer, E. Schaumann), Thieme, Stuttgart, 1996, pp. 5291-5355. Only intramolecular haloamination of olefins is relevant in synthesis, see inter alia: b) D. R. Williams, D. L. Brown, J. W. Benbow, J. Am. Chem. Soc. 1989, 111, 1923-1925; c) D. Tanner, M. Sellén, J. E. Bäckvall, J. Org. Chem. 1989, 54, 3374-3378; d) W. R. Bowman, D. L. Clark, R. J. Marmon, Tetrahedron 1994, 50, 1275-1294.
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For a general review of olefin amination reactions promoted by electrophiles, see: a) M. Orena in Methods of Organic Chemistry, Stereoselective Synthesis, Vol. 9 (Eds.: G. Helmchen, R. W. Hoffmann, J. Mulzer, E. Schaumann), Thieme, Stuttgart, 1996, pp. 5291-5355. Only intramolecular haloamination of olefins is relevant in synthesis, see inter alia: b) D. R. Williams, D. L. Brown, J. W. Benbow, J. Am. Chem. Soc. 1989, 111, 1923-1925; c) D. Tanner, M. Sellén, J. E. Bäckvall, J. Org. Chem. 1989, 54, 3374-3378; d) W. R. Bowman, D. L. Clark, R. J. Marmon, Tetrahedron 1994, 50, 1275-1294.
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5544259875
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note
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In this experiment the unreacted dihydropyridine 1b was recovered in 60% yield. This indicates an unexpected robustness for these compounds which were previously considered to be labile.
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For some recent references on the solution-phase combinatorial synthesis, see: a) D. L. Boger, C. M. Tarby, P. L. Myers, L. H. Caporale, J. Am. Chem. Soc. 1996, 118, 2109-2110; b) L. Neuville, J. Zhu, Tetrahedron Lett. 1997, 38, 4091-4094, and references therein: c) D. L. Boger, J. Goldberg, C.-M. Andersson, J. Org. Chem. 1999, 64, 2422-2427.
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For recent work on this subject, see: a) J. U. Jeong, B. Tao, I. Sagasser, H. Henniges, K. B. Sharpless, J. Am. Chem. Soc. 1998, 120, 6844-6845; b) T. Ando, D. Kano, S. Minakata, I. Ryu, M. Komatsu, Tetrahedron 1998, 54, 13485-13494; c) S. Minakata, T. Ando, M. Nishimura, I. Ryu, M. Komatsu, Angew. Chem. 1998, 110, 3596-3598; Angew. Chem. Int. Ed. 1998, 37, 3392-3394; d) M. Sunose, K. M. Anderson, G. Orpen, T. Gallagher, S. F. Macdonald, Tetrahedron Lett. 1998, 39, 8885-8888; e) See also ref. [18].
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For recent work on this subject, see: a) J. U. Jeong, B. Tao, I. Sagasser, H. Henniges, K. B. Sharpless, J. Am. Chem. Soc. 1998, 120, 6844-6845; b) T. Ando, D. Kano, S. Minakata, I. Ryu, M. Komatsu, Tetrahedron 1998, 54, 13485-13494; c) S. Minakata, T. Ando, M. Nishimura, I. Ryu, M. Komatsu, Angew. Chem. 1998, 110, 3596-3598; Angew. Chem. Int. Ed. 1998, 37, 3392-3394; d) M. Sunose, K. M. Anderson, G. Orpen, T. Gallagher, S. F. Macdonald, Tetrahedron Lett. 1998, 39, 8885-8888; e) See also ref. [18].
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For recent work on this subject, see: a) J. U. Jeong, B. Tao, I. Sagasser, H. Henniges, K. B. Sharpless, J. Am. Chem. Soc. 1998, 120, 6844-6845; b) T. Ando, D. Kano, S. Minakata, I. Ryu, M. Komatsu, Tetrahedron 1998, 54, 13485-13494; c) S. Minakata, T. Ando, M. Nishimura, I. Ryu, M. Komatsu, Angew. Chem. 1998, 110, 3596-3598; Angew. Chem. Int. Ed. 1998, 37, 3392-3394; d) M. Sunose, K. M. Anderson, G. Orpen, T. Gallagher, S. F. Macdonald, Tetrahedron Lett. 1998, 39, 8885-8888; e) See also ref. [18].
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5544298161
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e See also ref. [18]
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For recent work on this subject, see: a) J. U. Jeong, B. Tao, I. Sagasser, H. Henniges, K. B. Sharpless, J. Am. Chem. Soc. 1998, 120, 6844-6845; b) T. Ando, D. Kano, S. Minakata, I. Ryu, M. Komatsu, Tetrahedron 1998, 54, 13485-13494; c) S. Minakata, T. Ando, M. Nishimura, I. Ryu, M. Komatsu, Angew. Chem. 1998, 110, 3596-3598; Angew. Chem. Int. Ed. 1998, 37, 3392-3394; d) M. Sunose, K. M. Anderson, G. Orpen, T. Gallagher, S. F. Macdonald, Tetrahedron Lett. 1998, 39, 8885-8888; e) See also ref. [18].
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a) For a Hantzsch-type synthesis of a 3-sulfonyl-1,4-dihydropyridine, see: R. Davis, J. R. Kern, L. J. Kurz, J. R. Pfister, J. Am. Chem. Soc. 1988, 110, 7873-7874;
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b) For the recent synthesis of diversely substituted 5-sulfonyl-1,2,3,4-tetrahydropyridines, see: Y. Horino, M. Kimura, Y. Wakamiya, T. Okajima, Y. Tamaru, Angew. Chem. 1999, 111, 123-1246; Angew. Chem. Int. Ed. 1999, 38, 121-124.
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b) For the recent synthesis of diversely substituted 5-sulfonyl-1,2,3,4-tetrahydropyridines, see: Y. Horino, M. Kimura, Y. Wakamiya, T. Okajima, Y. Tamaru, Angew. Chem. 1999, 111, 123-1246; Angew. Chem. Int. Ed. 1999, 38, 121-124.
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For some references on this subject, see: a) L. M. Harwood, M. Julia, G. Le Thuillier, Tetrahedron 1980, 36, 2483-2487; b) K. Inomata, T. Kobayashi, S. Sasaoka, H. Kinoshita, H. Kotake, Chem. Lett. 1986, 289-292; c) L. K. Liu, Y. Chi, K.-Y. Jen, J. Org. Chem. 1980, 45, 406-410.
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Harwood, L.M.1
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5544236506
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For some references on this subject, see: a) L. M. Harwood, M. Julia, G. Le Thuillier, Tetrahedron 1980, 36, 2483-2487; b) K. Inomata, T. Kobayashi, S. Sasaoka, H. Kinoshita, H. Kotake, Chem. Lett. 1986, 289-292; c) L. K. Liu, Y. Chi, K.-Y. Jen, J. Org. Chem. 1980, 45, 406-410.
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For some references on this subject, see: a) L. M. Harwood, M. Julia, G. Le Thuillier, Tetrahedron 1980, 36, 2483-2487; b) K. Inomata, T. Kobayashi, S. Sasaoka, H. Kinoshita, H. Kotake, Chem. Lett. 1986, 289-292; c) L. K. Liu, Y. Chi, K.-Y. Jen, J. Org. Chem. 1980, 45, 406-410.
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56
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5544234316
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note
-
Similar results were observed with methyl 1-(3-methyl-3-butenyl)-1,4-dihydropyridine-3-carboxylate. The corresponding sulfonyldihydropyridine was obtained as the major product, although it was not purified.
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57
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0003869660
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Pergamon Press, Oxford, Chapters 4, 6, and 9
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N. S. Simpkins, Sulphones in Organic Synthesis, Pergamon Press, Oxford, 1993, Chapters 4, 6, and 9.
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59
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0031523030
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For a process which may be consistent with this hypothesis, see: P. Stanetty, M. D. Mihovilovic, K. Mereiter, Monatsch. Chem. 1997, 128, 1061-1072.
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Stanetty, P.1
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and references therein
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S. Obika, T. Nishiyama, S. Tatemasu, M. Nishimoto, K. Miyashita, T. Imanishi, Heterocycles 1998, 49, 261-267, and references therein.
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F. Kurzer in Organic Syntheses Vol. IV (Ed.: N. Rabjohn), Wiley, New York, 1963, pp. 937-939.
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D. A. Evans, M. M. Faul, L. Colombo, J. J. Bisaha, J. Clardy, D. Cherry, J. Am. Chem. Soc. 1992, 114, 5977-5985.
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a) R. Bonnett, R. G. Guy, D. Lanigan, Tetrahedron 1976, 32, 2439-2444;
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85173652625
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It has been claimed that a "dithiocyano adduct" was obtained through interaction of 1,4-dihydropyridines with thiocyanogen (H. P. Kaufmann, J. Liepe, Ber. 1923, 56, 2514-2520); however, "the structure has not been established" (also see comments on ref. [1a]).
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For alternative bis-sulfanylation strategies that take place with alkenes, see: a) M. C. Caserio, C. L. Fisher, J. K. Kim, J. Org. Chem. 1985, 50, 4390-4393; b) T. Kondo, S. Uenoyama, K. Fujita, T. Mitsudo, J. Am. Chem. Soc. 1999, 121, 482-483.
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For alternative bis-sulfanylation strategies that take place with alkenes, see: a) M. C. Caserio, C. L. Fisher, J. K. Kim, J. Org. Chem. 1985, 50, 4390-4393; b) T. Kondo, S. Uenoyama, K. Fujita, T. Mitsudo, J. Am. Chem. Soc. 1999, 121, 482-483.
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For early reports on the halogenation of 1,4-dihydropyridines that lead to heptachloro and tetrabromo compounds "whose structures were not established" (comments on ref. [1a]), see: a) A. Hantzsch, Justus Liebigs Ann. Chem. 1882, 215, 1-13; b) E. Benary, Chem. Ber. 1918, 51, 567-577; c) for the bromination of the more stable N-acyldihydropyridines, see: J. Urbanski, L. Wrobel, Pol. J. Chem. 1986, 59, 1099-1106.
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For early reports on the halogenation of 1,4-dihydropyridines that lead to heptachloro and tetrabromo compounds "whose structures were not established" (comments on ref. [1a]), see: a) A. Hantzsch, Justus Liebigs Ann. Chem. 1882, 215, 1-13; b) E. Benary, Chem. Ber. 1918, 51, 567-577; c) for the bromination of the more stable N-acyldihydropyridines, see: J. Urbanski, L. Wrobel, Pol. J. Chem. 1986, 59, 1099-1106.
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5544246931
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For early reports on the halogenation of 1,4-dihydropyridines that lead to heptachloro and tetrabromo compounds "whose structures were not established" (comments on ref. [1a]), see: a) A. Hantzsch, Justus Liebigs Ann. Chem. 1882, 215, 1-13; b) E. Benary, Chem. Ber. 1918, 51, 567-577; c) for the bromination of the more stable N-acyldihydropyridines, see: J. Urbanski, L. Wrobel, Pol. J. Chem. 1986, 59, 1099-1106.
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It should be noted that the halogen interaction with dihydropyridines is reported in several reviews (ref. [1a]) as an efficient procedure for the "biomimetic" oxidation of these compounds, leading to the corresponding pyridinium salts, and it has even been proposed as an analytical method for the estimation of the dihydropyridine content. Our results, however, are in good agreement with our recently described alkoxyhalogenation processes (see ref. [3a]). In sharp contrast, a related 1,2,3,4-tetrahydropyridine under similar reaction conditions afforded the bromoiminium bromide: D. Donati, S. Fusi, M. A. Macripò, F. Ponticelli, J. Heterocyclic Chem. 1987, 24, 481-483.
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0004018410
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VCH, Weinheim, and references therein
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For a discussion of the role of the solvent on the stereochemical course of halogen additions to alkenes, see: C. Reichardt, Solvents and Solvent Effects in Organic Chemistry, 2nd ed., VCH, Weinheim, 1988, pp. 248-249, and references therein.
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Reichardt, C.1
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74
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5544290764
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note
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Interestingly, when lithium diethylphosphite was added to a solution containing dibromide 17, a clean dehalogenation took place, and dihydropyridine 1b was obtained in nearly quantitative yield.
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75
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0000683796
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For recent examples of phosphonates linked to 6-membered nitrogen heterocycles, see: a) A. R. Katritzky, G. Qiu, B. Yang, P. J. Steel, J. Org. Chem. 1998, 63, 6699-6703; b) D. Albouy, M. Laspéras, G. Etemad-Moghadam, M. Koenig, Tetrahedron Lett. 1999, 40, 2311-2314.
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Katritzky, A.R.1
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Yang, B.3
Steel, P.J.4
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76
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0033583260
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For recent examples of phosphonates linked to 6-membered nitrogen heterocycles, see: a) A. R. Katritzky, G. Qiu, B. Yang, P. J. Steel, J. Org. Chem. 1998, 63, 6699-6703; b) D. Albouy, M. Laspéras, G. Etemad-Moghadam, M. Koenig, Tetrahedron Lett. 1999, 40, 2311-2314.
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Albouy, D.1
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a) M. E. Brewster, A. Simay, K. Czako, D. Winwood, H. Farag, N. Bodor, J. Org. Chem. 1989, 54, 3721-3726;
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78
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0001023433
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b) Dihydropyridine 1h was prepared following a published procedure: M. Lounasmaa, C.-J. Johansson, Tetrahedron 1977, 33, 113-117.
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