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7. For the synthesis of racemic and enantiopure 2,3-methano proline, see (a) Hercouet, A.; Bessières, B., Le Corre, M. Tetrahedron: Asymmetry 1996, 7, 1267.
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(b) Switzer, F. L.; van Halbeek, H.; Holt, E. M.; Stammer, C. H. Tetrahedron 1989, 45, 6091. For recent accounts on 2,3-methano amino acids, see: Stammer, C. H. Tetrahedron 1990, 46, 2231; Burgess, K.; Ho, K. K.; Moyl-Sherman, D. Synlett 1994, 575; Burgess, K.; Ke, C.-Y. J. Org. Chem. 1996, 61, 8627. Jiménez, J. M.; Ortuno, R. M. Tetrahedron: Asymmetry 1996, 7, 3203, and references cited therein.
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(b) Switzer, F. L.; van Halbeek, H.; Holt, E. M.; Stammer, C. H. Tetrahedron 1989, 45, 6091. For recent accounts on 2,3-methano amino acids, see: Stammer, C. H. Tetrahedron 1990, 46, 2231; Burgess, K.; Ho, K. K.; Moyl-Sherman, D. Synlett 1994, 575; Burgess, K.; Ke, C.-Y. J. Org. Chem. 1996, 61, 8627. Jiménez, J. M.; Ortuno, R. M. Tetrahedron: Asymmetry 1996, 7, 3203, and references cited therein.
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(b) Switzer, F. L.; van Halbeek, H.; Holt, E. M.; Stammer, C. H. Tetrahedron 1989, 45, 6091. For recent accounts on 2,3-methano amino acids, see: Stammer, C. H. Tetrahedron 1990, 46, 2231; Burgess, K.; Ho, K. K.; Moyl-Sherman, D. Synlett 1994, 575; Burgess, K.; Ke, C.-Y. J. Org. Chem. 1996, 61, 8627. Jiménez, J. M.; Ortuno, R. M. Tetrahedron: Asymmetry 1996, 7, 3203, and references cited therein.
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(b) Switzer, F. L.; van Halbeek, H.; Holt, E. M.; Stammer, C. H. Tetrahedron 1989, 45, 6091. For recent accounts on 2,3-methano amino acids, see: Stammer, C. H. Tetrahedron 1990, 46, 2231; Burgess, K.; Ho, K. K.; Moyl-Sherman, D. Synlett 1994, 575; Burgess, K.; Ke, C.-Y. J. Org. Chem. 1996, 61, 8627. Jiménez, J. M.; Ortuno, R. M. Tetrahedron: Asymmetry 1996, 7, 3203, and references cited therein.
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Jiménez, J.M.1
Ortuno, R.M.2
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18
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0015223124
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8. For the synthesis of cis- and trans-3,4-methano prolines, see (a) Fujimoto, Y.; Irrevere, F.; Karle, J. M.; Karle, I. L.; Witkop, B. J. Am. Chem. Soc. 1971, 93, 3471; for a recent discussion of cyclopropyl pyrrolidines, see Harvey, D. F.; Sigano, D. M. J. Org. Chem. 1996, 61, 2268; Brighty, K. E.; Castaldi, M. J. Synlett 1996, 1097.
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19
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8. For the synthesis of cis- and trans-3,4-methano prolines, see (a) Fujimoto, Y.; Irrevere, F.; Karle, J. M.; Karle, I. L.; Witkop, B. J. Am. Chem. Soc. 1971, 93, 3471; for a recent discussion of cyclopropyl pyrrolidines, see Harvey, D. F.; Sigano, D. M. J. Org. Chem. 1996, 61, 2268; Brighty, K. E.; Castaldi, M. J. Synlett 1996, 1097.
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20
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0003154786
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8. For the synthesis of cis- and trans-3,4-methano prolines, see (a) Fujimoto, Y.; Irrevere, F.; Karle, J. M.; Karle, I. L.; Witkop, B. J. Am. Chem. Soc. 1971, 93, 3471; for a recent discussion of cyclopropyl pyrrolidines, see Harvey, D. F.; Sigano, D. M. J. Org. Chem. 1996, 61, 2268; Brighty, K. E.; Castaldi, M. J. Synlett 1996, 1097.
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37049066716
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Ger. Offen. DE 3,324,263 (Cl. C07D209/2)
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9. For the synthesis of racemic 4,5-methano proline amides, see a) H. Urbach, R. Henning, R. Becker, Ger. Offen. DE 3,324,263 (Cl. C07D209/2); Chem. Abstr. 1985, 103: P 54461q; for a related example involving mixtures of diastereomers, see also R. Pellicciari, L. Arenare, P. De Caprariis, B. Natalin, M. Marinozzi, A. Galli, J. Chem. Soc. Perkin 1. 1995, 1251.
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37049066716
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9. For the synthesis of racemic 4,5-methano proline amides, see a) H. Urbach, R. Henning, R. Becker, Ger. Offen. DE 3,324,263 (Cl. C07D209/2); Chem. Abstr. 1985, 103: P 54461q; for a related example involving mixtures of diastereomers, see also R. Pellicciari, L. Arenare, P. De Caprariis, B. Natalin, M. Marinozzi, A. Galli, J. Chem. Soc. Perkin 1. 1995, 1251.
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0001053043
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Aoki, T.7
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24
-
-
0010376966
-
-
note
-
11. Typical procedure: A mixture containing N-Boc-5-methoxy-(2S)-pyrrolidine-1-carboxylic acid ethyl ester (1.2 g, 4.4 mmol) and ammonium chloride (0.044 g, 0.15 equiv) was heated under reduced pressure (20-100 mm Hg) in a flask equipped with a reflux condenser. The reaction mixture was allowed to cool to room temperature, and the resultant oil was purified by flash chromatography on silica gel (hexanes-ethyl acetate, 9:1) to afford the product 12 (0.854 g, 81%) as a colorless oil.
-
-
-
-
25
-
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0000794592
-
-
12. Dieter, R.K.; Sharma, R.R. J. Org. Chem. 1996, 61, 4180; Cossy, J.; Cases, M.; Pardo, D.G. Syn. Commun. 1997, 27, 2769.
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0030875142
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12. Dieter, R.K.; Sharma, R.R. J. Org. Chem. 1996, 61, 4180; Cossy, J.; Cases, M.; Pardo, D.G. Syn. Commun. 1997, 27, 2769.
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Cases, M.2
Pardo, D.G.3
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27
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0002664878
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13. Furukawa, J.; Kawabata, N.; Nishimura, J. Tetrahedron 1968, 24, 53.
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Nishimura, J.3
-
28
-
-
0010378858
-
-
note
-
2), and separated by chromatograhy to give 13 and 14 (75% yield, 1:4 ratio).
-
-
-
-
29
-
-
0010597031
-
-
15. For related examples of directed cyclopropanations see, Charette, A. B.; Marcoux, J.-F. Synlett 1995, 1197; For examples of proximity effects, see Beak, P.; Meyers, A. I. Acc. Chem. Res. 1986, 19, 356.
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Charette, A.B.1
Marcoux, J.-F.2
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2042487195
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15. For related examples of directed cyclopropanations see, Charette, A. B.; Marcoux, J.-F. Synlett 1995, 1197; For examples of proximity effects, see Beak, P.; Meyers, A. I. Acc. Chem. Res. 1986, 19, 356.
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Beak, P.1
Meyers, A.I.2
|