Chiral zirconium-catalyzed asymmetric mannich-type reactions using acylhydrazones as imine equivalents

Chemistry Letters

Volumn , Issue 11, 1998, Pages 1131-1132

  Kobayashi, Shu ^a   Hasegawa, Yoshiki ^b   Ishitani, Haruro ^b  

^a UNIVERSITY OF TOKYO   (Japan)

^b NONE

Author keywords

[No Author keywords available]

Indexed keywords

EID: 0032271640     PISSN: 03667022     EISSN: None     Source Type: Journal    
DOI: 10.1246/cl.1998.1131     Document Type: Article

References (25)

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11. b) S. Kobayashi, H. Ishitani, and M. Ueno, J. Am. Chem. Soc., 120, 4548 (1998). See also, H. Fujieda, M. Kanai, T. Kambara, A. Iida, and K. Tomioka, J. Am. Chem. Soc., 119, 2060 (1997); E. Hagiwara, A. Fujii, and M. Sodeoka, J. Am. Chem. Soc., 120, 2474 (1998); D. Ferraris, B. Young, T. Dudding, and T. Lectcka, J. Am. Chem. Soc., 120, 4548 (1998).
12. b) S. Kobayashi, H. Ishitani, and M. Ueno, J. Am. Chem. Soc., 120, 4548 (1998). See also, H. Fujieda, M. Kanai, T. Kambara, A. Iida, and K. Tomioka, J. Am. Chem. Soc., 119, 2060 (1997); E. Hagiwara, A. Fujii, and M. Sodeoka, J. Am. Chem. Soc., 120, 2474 (1998); D. Ferraris, B. Young, T. Dudding, and T. Lectcka, J. Am. Chem. Soc., 120, 4548 (1998).
13. b) S. Kobayashi, H. Ishitani, and M. Ueno, J. Am. Chem. Soc., 120, 4548 (1998). See also, H. Fujieda, M. Kanai, T. Kambara, A. Iida, and K. Tomioka, J. Am. Chem. Soc., 119, 2060 (1997); E. Hagiwara, A. Fujii, and M. Sodeoka, J. Am. Chem. Soc., 120, 2474 (1998); D. Ferraris, B. Young, T. Dudding, and T. Lectcka, J. Am. Chem. Soc., 120, 4548 (1998).
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20. When the yields were moderate, the starting materials were recovered. Acyl hydrazones derived from bulky aldehydes such as 2-methylpropionaldehyde and 2,2-dimethylpropionaldehyde did not react under these conditions.
21. 5b
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24. Cf. A. Alexakis, N. Lensen, and P. Mangeney, Synlett, 1991, 625; D. Seebach and W. Wykypiel, Synthesis, 1979, 423 ; S. E. Denmark, T. Weber, and D. W. Piotrowski, J. Am. Chem. Soc., 109, 2224 (1987 ).
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