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Aza-enolization of imines with Grignard reagents: Stork, G.; Dowd, S. R. J. Am. Chem. Soc. 1963, 85, 2178. Less basic organocerium reagents also exhibit aza-enolization: Enders, D.; Diez, E.; Fernandez, R.; Martin- Zamora, E.; Munoz, J. M.; Pappalardo, R. R.; Lassaleta, J. M. J. Org. Chem. 1999, 64, 6329.
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Aza-enolization of imines with Grignard reagents: Stork, G.; Dowd, S. R. J. Am. Chem. Soc. 1963, 85, 2178. Less basic organocerium reagents also exhibit aza-enolization: Enders, D.; Diez, E.; Fernandez, R.; Martin-Zamora, E.; Munoz, J. M.; Pappalardo, R. R.; Lassaleta, J. M. J. Org. Chem. 1999, 64, 6329.
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0034701211
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For selected recent examples, see: (a) Strecker reactions: Porter, J. R.; Wirschun, W. G.; Kuntz, K. W.; Snapper, M. L.; Hoveyda, A. H. J. Am. Chem. Soc. 2000, 122, 2657. Ishitani, H.; Komiyama, S.; Hasegawa, Y.; Kobayashi, S. J. Am. Chem. Soc. 2000, 122, 762. Corey, E. J.; Grogan, M. J. Org. Lett. 1999, 1, 157. (b) Mannich reactions: Fujii, A.; Hagiwara, E.; Sodeoka, M. J. Am. Chem. Soc. 1999, 121, 5450. Ferraris, D.; Dudding, T.; Young, B.; Drury, W. J., III; Lectka, T. J. Org. Chem. 1999, 64, 2168. (c) Allylation: Kobayashi, S.; Hirabayashi, R. J. Am. Chem. Soc. 1999, 121, 6942. (d) Imino-ene reaction: Drury, W. J., III; Ferraris, D.; Cox, C.; Young, B.; Lectka, T. J. Am. Chem. Soc. 1998, 120, 11006. Yamanaka, M.; Nishida, A.; Nakagawa, M. Org. Lett. 2000, 2, 159.
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Porter, J.R.1
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Hoveyda, A.H.5
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9
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0034624418
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For selected recent examples, see: (a) Strecker reactions: Porter, J. R.; Wirschun, W. G.; Kuntz, K. W.; Snapper, M. L.; Hoveyda, A. H. J. Am. Chem. Soc. 2000, 122, 2657. Ishitani, H.; Komiyama, S.; Hasegawa, Y.; Kobayashi, S. J. Am. Chem. Soc. 2000, 122, 762. Corey, E. J.; Grogan, M. J. Org. Lett. 1999, 1, 157. (b) Mannich reactions: Fujii, A.; Hagiwara, E.; Sodeoka, M. J. Am. Chem. Soc. 1999, 121, 5450. Ferraris, D.; Dudding, T.; Young, B.; Drury, W. J., III; Lectka, T. J. Org. Chem. 1999, 64, 2168. (c) Allylation: Kobayashi, S.; Hirabayashi, R. J. Am. Chem. Soc. 1999, 121, 6942. (d) Imino-ene reaction: Drury, W. J., III; Ferraris, D.; Cox, C.; Young, B.; Lectka, T. J. Am. Chem. Soc. 1998, 120, 11006. Yamanaka, M.; Nishida, A.; Nakagawa, M. Org. Lett. 2000, 2, 159.
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For selected recent examples, see: (a) Strecker reactions: Porter, J. R.; Wirschun, W. G.; Kuntz, K. W.; Snapper, M. L.; Hoveyda, A. H. J. Am. Chem. Soc. 2000, 122, 2657. Ishitani, H.; Komiyama, S.; Hasegawa, Y.; Kobayashi, S. J. Am. Chem. Soc. 2000, 122, 762. Corey, E. J.; Grogan, M. J. Org. Lett. 1999, 1, 157. (b) Mannich reactions: Fujii, A.; Hagiwara, E.; Sodeoka, M. J. Am. Chem. Soc. 1999, 121, 5450. Ferraris, D.; Dudding, T.; Young, B.; Drury, W. J., III; Lectka, T. J. Org. Chem. 1999, 64, 2168. (c) Allylation: Kobayashi, S.; Hirabayashi, R. J. Am. Chem. Soc. 1999, 121, 6942. (d) Imino-ene reaction: Drury, W. J., III; Ferraris, D.; Cox, C.; Young, B.; Lectka, T. J. Am. Chem. Soc. 1998, 120, 11006. Yamanaka, M.; Nishida, A.; Nakagawa, M. Org. Lett. 2000, 2, 159.
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For selected recent examples, see: (a) Strecker reactions: Porter, J. R.; Wirschun, W. G.; Kuntz, K. W.; Snapper, M. L.; Hoveyda, A. H. J. Am. Chem. Soc. 2000, 122, 2657. Ishitani, H.; Komiyama, S.; Hasegawa, Y.; Kobayashi, S. J. Am. Chem. Soc. 2000, 122, 762. Corey, E. J.; Grogan, M. J. Org. Lett. 1999, 1, 157. (b) Mannich reactions: Fujii, A.; Hagiwara, E.; Sodeoka, M. J. Am. Chem. Soc. 1999, 121, 5450. Ferraris, D.; Dudding, T.; Young, B.; Drury, W. J., III; Lectka, T. J. Org. Chem. 1999, 64, 2168. (c) Allylation: Kobayashi, S.; Hirabayashi, R. J. Am. Chem. Soc. 1999, 121, 6942. (d) Imino-ene reaction: Drury, W. J., III; Ferraris, D.; Cox, C.; Young, B.; Lectka, T. J. Am. Chem. Soc. 1998, 120, 11006. Yamanaka, M.; Nishida, A.; Nakagawa, M. Org. Lett. 2000, 2, 159.
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For selected recent examples, see: (a) Strecker reactions: Porter, J. R.; Wirschun, W. G.; Kuntz, K. W.; Snapper, M. L.; Hoveyda, A. H. J. Am. Chem. Soc. 2000, 122, 2657. Ishitani, H.; Komiyama, S.; Hasegawa, Y.; Kobayashi, S. J. Am. Chem. Soc. 2000, 122, 762. Corey, E. J.; Grogan, M. J. Org. Lett. 1999, 1, 157. (b) Mannich reactions: Fujii, A.; Hagiwara, E.; Sodeoka, M. J. Am. Chem. Soc. 1999, 121, 5450. Ferraris, D.; Dudding, T.; Young, B.; Drury, W. J., III; Lectka, T. J. Org. Chem. 1999, 64, 2168. (c) Allylation: Kobayashi, S.; Hirabayashi, R. J. Am. Chem. Soc. 1999, 121, 6942. (d) Imino-ene reaction: Drury, W. J., III; Ferraris, D.; Cox, C.; Young, B.; Lectka, T. J. Am. Chem. Soc. 1998, 120, 11006. Yamanaka, M.; Nishida, A.; Nakagawa, M. Org. Lett. 2000, 2, 159.
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For selected recent examples, see: (a) Strecker reactions: Porter, J. R.; Wirschun, W. G.; Kuntz, K. W.; Snapper, M. L.; Hoveyda, A. H. J. Am. Chem. Soc. 2000, 122, 2657. Ishitani, H.; Komiyama, S.; Hasegawa, Y.; Kobayashi, S. J. Am. Chem. Soc. 2000, 122, 762. Corey, E. J.; Grogan, M. J. Org. Lett. 1999, 1, 157. (b) Mannich reactions: Fujii, A.; Hagiwara, E.; Sodeoka, M. J. Am. Chem. Soc. 1999, 121, 5450. Ferraris, D.; Dudding, T.; Young, B.; Drury, W. J., III; Lectka, T. J. Org. Chem. 1999, 64, 2168. (c) Allylation: Kobayashi, S.; Hirabayashi, R. J. Am. Chem. Soc. 1999, 121, 6942. (d) Imino-ene reaction: Drury, W. J., III; Ferraris, D.; Cox, C.; Young, B.; Lectka, T. J. Am. Chem. Soc. 1998, 120, 11006. Yamanaka, M.; Nishida, A.; Nakagawa, M. Org. Lett. 2000, 2, 159.
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For selected recent examples, see: (a) Strecker reactions: Porter, J. R.; Wirschun, W. G.; Kuntz, K. W.; Snapper, M. L.; Hoveyda, A. H. J. Am. Chem. Soc. 2000, 122, 2657. Ishitani, H.; Komiyama, S.; Hasegawa, Y.; Kobayashi, S. J. Am. Chem. Soc. 2000, 122, 762. Corey, E. J.; Grogan, M. J. Org. Lett. 1999, 1, 157. (b) Mannich reactions: Fujii, A.; Hagiwara, E.; Sodeoka, M. J. Am. Chem. Soc. 1999, 121, 5450. Ferraris, D.; Dudding, T.; Young, B.; Drury, W. J., III; Lectka, T. J. Org. Chem. 1999, 64, 2168. (c) Allylation: Kobayashi, S.; Hirabayashi, R. J. Am. Chem. Soc. 1999, 121, 6942. (d) Imino-ene reaction: Drury, W. J., III; Ferraris, D.; Cox, C.; Young, B.; Lectka, T. J. Am. Chem. Soc. 1998, 120, 11006. Yamanaka, M.; Nishida, A.; Nakagawa, M. Org. Lett. 2000, 2, 159.
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Lectka, T.5
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For selected recent examples, see: (a) Strecker reactions: Porter, J. R.; Wirschun, W. G.; Kuntz, K. W.; Snapper, M. L.; Hoveyda, A. H. J. Am. Chem. Soc. 2000, 122, 2657. Ishitani, H.; Komiyama, S.; Hasegawa, Y.; Kobayashi, S. J. Am. Chem. Soc. 2000, 122, 762. Corey, E. J.; Grogan, M. J. Org. Lett. 1999, 1, 157. (b) Mannich reactions: Fujii, A.; Hagiwara, E.; Sodeoka, M. J. Am. Chem. Soc. 1999, 121, 5450. Ferraris, D.; Dudding, T.; Young, B.; Drury, W. J., III; Lectka, T. J. Org. Chem. 1999, 64, 2168. (c) Allylation: Kobayashi, S.; Hirabayashi, R. J. Am. Chem. Soc. 1999, 121, 6942. (d) Imino-ene reaction: Drury, W. J., III; Ferraris, D.; Cox, C.; Young, B.; Lectka, T. J. Am. Chem. Soc. 1998, 120, 11006. Yamanaka, M.; Nishida, A.; Nakagawa, M. Org. Lett. 2000, 2, 159.
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For representative nonstereoselective intermolecular radical additions to C=N, see: Hart, D. J.; Seely, F. L. J. Am. Chem. Soc. 1988, 110, 1631. Shono, T.; Kise, N.; Fujimoto, T. Tetrahedron Lett. 1991, 32, 525. Hanamoto, T.; Inanaga, J. Tetrahedron Lett. 1991, 32, 3555. Kim, S.; Yoon, J.-Y. J. Am. Chem. Soc. 1997, 119, 5982. Miyabe, H.; Shibata, R.; Ushiro, C.; Naito, T. Tetrahedron Lett. 1998, 39, 631. Miyabe, H.; Shibata, R.; Sangawa, M.; Ushiro, C.; Naito, T. Tetrahedron 1998, 54, 11431. Bertrand, M. P.; Feray, L.; Nouguier, R.; Perfetti, P. J. Org. Chem. 1999, 64, 9189. Miyabe, H.; Ueda, M.; Yoshioka, N.; Yamakawa, K.; Naito, T. Tetrahedron 2000, 56, 2413.
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Oxazolidinones have been used previously for stereocontrolled radical addition to alkenes. (a) Sibi, M. P.; Jasperse, C. P.; Ji, J. J. Am. Chem. Soc. 1995, 117, 10779. (b) Sibi, M. P.; Ji, J.; Sausker, J. B.; Jasperse, C. P. J. Am. Chem. Soc. 1999, 121, 7517.
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0343875673
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note
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2) of N-acylhydrazones proved to be generally efficient; from appropriate ketone N-acylhydrazones, both diastereomers of 9c-f and 10c-f were acquired for characterization purposes (see Supporting Information).
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7 Preliminary experiments with 8 gave 1 as the major product (57% yield).
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0342569988
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note
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2CuLi followed by interchange of the carbamate to benzamide. (b) Benzoylation of 10f (81% yield) as indicated in Scheme 2 gave material suitable for X-ray crystallography (see Supporting Information).
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12b
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