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Recently, catalytic asymmetric cyanation reactions of Schiff bases have been reported. (a) Iyer, M. S.; Gigstad, K. M.; Namdev, N. D.; Lipton, M. J. Am. Chem. Soc. 1996, 118, 4910. (b) Sigman, M. S.; Jacobsen, E. N. J. Am. Chem. Soc. 1998, 120, 4901. (c) Sigman, M. S.; Jacobsen, E. N. J. Am. Chem. Soc. 1998, 120, 5315. (d) Ishitani, H.; Komiyama, S.; Kobayashi, S. Angew. Chem., Int. Ed. Engl. 1998, 37, 3186. (e) Krueger, C. A.; Kuntz, K. W.; Dzieba, C. D.; Wirschum, W. G.; Gleason, J. D.; Snapper, M. L.; Hoveyda, A. H. J. Am. Chem. Soc. 1999, 121, 4284. (f) Corey, E. J.; Grogan, M. J. Org. Lett 1999, 1, 157. In all these cases, no example of the three-component reactions that succeed to the original Strecker reaction was reported. In addition, lower selectivities were obtained using Shiff bases derived from aliphatic aldehydes, which restricts use of these reactions for α-amino acid syntheses.
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0003554758
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Recently, catalytic asymmetric cyanation reactions of Schiff bases have been reported. (a) Iyer, M. S.; Gigstad, K. M.; Namdev, N. D.; Lipton, M. J. Am. Chem. Soc. 1996, 118, 4910. (b) Sigman, M. S.; Jacobsen, E. N. J. Am. Chem. Soc. 1998, 120, 4901. (c) Sigman, M. S.; Jacobsen, E. N. J. Am. Chem. Soc. 1998, 120, 5315. (d) Ishitani, H.; Komiyama, S.; Kobayashi, S. Angew. Chem., Int. Ed. Engl. 1998, 37, 3186. (e) Krueger, C. A.; Kuntz, K. W.; Dzieba, C. D.; Wirschum, W. G.; Gleason, J. D.; Snapper, M. L.; Hoveyda, A. H. J. Am. Chem. Soc. 1999, 121, 4284. (f) Corey, E. J.; Grogan, M. J. Org. Lett 1999, 1, 157. In all these cases, no example of the three-component reactions that succeed to the original Strecker reaction was reported. In addition, lower selectivities were obtained using Shiff bases derived from aliphatic aldehydes, which restricts use of these reactions for α-amino acid syntheses.
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Sigman, M.S.1
Jacobsen, E.N.2
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9
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0032479019
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Recently, catalytic asymmetric cyanation reactions of Schiff bases have been reported. (a) Iyer, M. S.; Gigstad, K. M.; Namdev, N. D.; Lipton, M. J. Am. Chem. Soc. 1996, 118, 4910. (b) Sigman, M. S.; Jacobsen, E. N. J. Am. Chem. Soc. 1998, 120, 4901. (c) Sigman, M. S.; Jacobsen, E. N. J. Am. Chem. Soc. 1998, 120, 5315. (d) Ishitani, H.; Komiyama, S.; Kobayashi, S. Angew. Chem., Int. Ed. Engl. 1998, 37, 3186. (e) Krueger, C. A.; Kuntz, K. W.; Dzieba, C. D.; Wirschum, W. G.; Gleason, J. D.; Snapper, M. L.; Hoveyda, A. H. J. Am. Chem. Soc. 1999, 121, 4284. (f) Corey, E. J.; Grogan, M. J. Org. Lett 1999, 1, 157. In all these cases, no example of the three-component reactions that succeed to the original Strecker reaction was reported. In addition, lower selectivities were obtained using Shiff bases derived from aliphatic aldehydes, which restricts use of these reactions for α-amino acid syntheses.
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Sigman, M.S.1
Jacobsen, E.N.2
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10
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0032484050
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Recently, catalytic asymmetric cyanation reactions of Schiff bases have been reported. (a) Iyer, M. S.; Gigstad, K. M.; Namdev, N. D.; Lipton, M. J. Am. Chem. Soc. 1996, 118, 4910. (b) Sigman, M. S.; Jacobsen, E. N. J. Am. Chem. Soc. 1998, 120, 4901. (c) Sigman, M. S.; Jacobsen, E. N. J. Am. Chem. Soc. 1998, 120, 5315. (d) Ishitani, H.; Komiyama, S.; Kobayashi, S. Angew. Chem., Int. Ed. Engl. 1998, 37, 3186. (e) Krueger, C. A.; Kuntz, K. W.; Dzieba, C. D.; Wirschum, W. G.; Gleason, J. D.; Snapper, M. L.; Hoveyda, A. H. J. Am. Chem. Soc. 1999, 121, 4284. (f) Corey, E. J.; Grogan, M. J. Org. Lett 1999, 1, 157. In all these cases, no example of the three-component reactions that succeed to the original Strecker reaction was reported. In addition, lower selectivities were obtained using Shiff bases derived from aliphatic aldehydes, which restricts use of these reactions for α-amino acid syntheses.
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Ishitani, H.1
Komiyama, S.2
Kobayashi, S.3
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11
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0033526392
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Recently, catalytic asymmetric cyanation reactions of Schiff bases have been reported. (a) Iyer, M. S.; Gigstad, K. M.; Namdev, N. D.; Lipton, M. J. Am. Chem. Soc. 1996, 118, 4910. (b) Sigman, M. S.; Jacobsen, E. N. J. Am. Chem. Soc. 1998, 120, 4901. (c) Sigman, M. S.; Jacobsen, E. N. J. Am. Chem. Soc. 1998, 120, 5315. (d) Ishitani, H.; Komiyama, S.; Kobayashi, S. Angew. Chem., Int. Ed. Engl. 1998, 37, 3186. (e) Krueger, C. A.; Kuntz, K. W.; Dzieba, C. D.; Wirschum, W. G.; Gleason, J. D.; Snapper, M. L.; Hoveyda, A. H. J. Am. Chem. Soc. 1999, 121, 4284. (f) Corey, E. J.; Grogan, M. J. Org. Lett 1999, 1, 157. In all these cases, no example of the three-component reactions that succeed to the original Strecker reaction was reported. In addition, lower selectivities were obtained using Shiff bases derived from aliphatic aldehydes, which restricts use of these reactions for α-amino acid syntheses.
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Krueger, C.A.1
Kuntz, K.W.2
Dzieba, C.D.3
Wirschum, W.G.4
Gleason, J.D.5
Snapper, M.L.6
Hoveyda, A.H.7
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12
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0033564990
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Recently, catalytic asymmetric cyanation reactions of Schiff bases have been reported. (a) Iyer, M. S.; Gigstad, K. M.; Namdev, N. D.; Lipton, M. J. Am. Chem. Soc. 1996, 118, 4910. (b) Sigman, M. S.; Jacobsen, E. N. J. Am. Chem. Soc. 1998, 120, 4901. (c) Sigman, M. S.; Jacobsen, E. N. J. Am. Chem. Soc. 1998, 120, 5315. (d) Ishitani, H.; Komiyama, S.; Kobayashi, S. Angew. Chem., Int. Ed. Engl. 1998, 37, 3186. (e) Krueger, C. A.; Kuntz, K. W.; Dzieba, C. D.; Wirschum, W. G.; Gleason, J. D.; Snapper, M. L.; Hoveyda, A. H. J. Am. Chem. Soc. 1999, 121, 4284. (f) Corey, E. J.; Grogan, M. J. Org. Lett 1999, 1, 157. In all these cases, no example of the three-component reactions that succeed to the original Strecker reaction was reported. In addition, lower selectivities were obtained using Shiff bases derived from aliphatic aldehydes, which restricts use of these reactions for α-amino acid syntheses.
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Corey, E.J.1
Grogan, M.J.2
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13
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0003051740
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For achiral Strecker reactions, see: (a) Ojima, I.; Inaba, S.; Nakatsugawa, K. Chem. Lett. 1975, 331. (b) Mai, K.; Patil, G. Tetrahedron Lett. 1984, 23, 4583. (c) Kobayashi, S.; Ishitani, H.; Ueno, M. Synlett 1997. 115.
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Mai, K.1
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15
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0002794514
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For achiral Strecker reactions, see: (a) Ojima, I.; Inaba, S.; Nakatsugawa, K. Chem. Lett. 1975, 331. (b) Mai, K.; Patil, G. Tetrahedron Lett. 1984, 23, 4583. (c) Kobayashi, S.; Ishitani, H.; Ueno, M. Synlett 1997. 115.
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12944336867
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note
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3SnCN as a cyanation source, see 6d.
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Kobayashi, S.; Komiyama, S.; Ishitani, H. Angew. Chem., Int. Ed. Engl. 1998, 37, 979.
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Tin Research Institute: Greenford
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Commercially available (Aldrich, etc.). (a) Luijten, J. G. A.; van der Kerk, G. J. M. Investigations in the Field of Organotin Chemistry; Tin Research Institute: Greenford, 1995; p 106. (b) Tanaka, M. Tetrahedron Lett. 1980, 21, 2959. (c) Harusawa, S.; Yoneda, R.; Omori, Y.; Kurihara, T. Tetrahedron Lett. 1987, 28, 4189.
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Commercially available (Aldrich, etc.). (a) Luijten, J. G. A.; van der Kerk, G. J. M. Investigations in the Field of Organotin Chemistry; Tin Research Institute: Greenford, 1995; p 106. (b) Tanaka, M. Tetrahedron Lett. 1980, 21, 2959. (c) Harusawa, S.; Yoneda, R.; Omori, Y.; Kurihara, T. Tetrahedron Lett. 1987, 28, 4189.
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12944322488
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note
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4, 1 equiv of (R)-6-Br-BINOL and (R)-3,3′-dibromo-1,1′-bi-2-naphthol ((R)-3-Br-BINOL), and 3 equiv of NMI.
-
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27
-
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12944297466
-
-
note
-
When TMSCN was used in this system, moderate yields and moderate enantiomeric excesses were observed. The reaction of the aldimine prepared from 1-naphthaldehyde and 2-aminophenol with TMSCN, 33% yield, 63% ee; with triethylsilyl cyanide, 65% yield, 63% ee (not optimized).
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28
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37049122967
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(a) Brown, J. M.; Chapman, A. C.; Harper, R.; Mowthorpe, D. J.; Davies, A. G.; Smith, P. J. J. Chem. Soc., Dalton 1972, 338.
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0000122774
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3SnCN (achiral reactions). In these reactions, complete recovery of tin compounds toward environmentally friendly chemical processes has been achieved. Kobayashi, S.; Busujima, T.; Nagayama, S. J. Chem. Soc., Chem. Commun. 1998, 981.
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3SnCN and HCN. For catalysts 3 and 4, 4 is more active than 3, presumably because of the two cyano groups.
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