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0343195635
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note
-
The difluoroketene silyl acetal 1 is considerably stable and can be stored at -20°C over several months.
-
-
-
-
20
-
-
0003788192
-
-
and references cited therein
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The CAB catalyst developed by Yamamoto at al. (Furuta, K.; Maruyama, T.; Yamamoto, H. Synlett, 1991, 439-440 and references cited therein) and the BINOL-derived titanium complex of Mikami et al. (Mikami, K.; Matsukawa, S. J. Am. Chem. Soc. 1994, 116, 4077-4078 and references cited therein) were not effective for enamioselectivity.
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Synlett
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Furuta, K.1
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21
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0001087242
-
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and references cited therein were not effective for enamioselectivity
-
The CAB catalyst developed by Yamamoto at al. (Furuta, K.; Maruyama, T.; Yamamoto, H. Synlett, 1991, 439-440 and references cited therein) and the BINOL-derived titanium complex of Mikami et al. (Mikami, K.; Matsukawa, S. J. Am. Chem. Soc. 1994, 116, 4077-4078 and references cited therein) were not effective for enamioselectivity.
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Mikami, K.1
Matsukawa, S.2
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0001015876
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3·THF and p-toluenesulfonamide of the corresponding amino acid in nitroethane at 45°C for 1 h. See: a) Parmee, E.R.; Tempkin, O.; Masamune, S. J. Am. Chem. Soc. 1991, 113, 9365-9366.
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24
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0000407979
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3·THF and p-nitrobenzenesulfonamide of (S)-tert-leucine in nitroethane at 45°C for 1 h. See: a) Kiyooka, S.; Kaneko, Y.; Komura, M.; Matsuo, H.; Nakano, M. J. Org. Chem. 1991, 56, 2276-2278.
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33745775152
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The aldol reaction of enoxysilacyclobutanes was reported to proceed through cyclic transition states in the absence of Lewis acids. See: a) Myers, A.G.; Kephart, S.E.; Chen, H. J. Am. Chem. Soc. 1992, 114, 7922-7923.
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0000019167
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29
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0004133516
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Gaussian 92, Revision A: Frisch, M.J.; Trucks, G.W.; Head-Gordon, M.; Gill, P.M.W.; Wong, M.W.; Foresman, J.B.; Johnson, B.G.; Schlegel, H.B.; Robb, M.A.; Replogle, E.S.; Gomperts, R.; Andres, J.L.; Raghavachari, K.; Binkley, J.S.; Gonzalez, C.; Martin, R.L.; Fox, D.J.; Defrees, D.J.; Baker, J.; Stewart, J.J.P.; Pople, J.A. Gaussian, Inc., Pittsburgh PA, 1992.
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Andres, J.L.12
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Martin, R.L.16
Fox, D.J.17
Defrees, D.J.18
Baker, J.19
Stewart, J.J.P.20
Pople, J.A.21
more..
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30
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0001087242
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Mikami et al. suggested the silatropic ene mechanism for the asymmetric catalysis of aldol-type reactions with ketene silyl acetals. See: a) Mikami, K.; Matsukawa, S. J. Am. Chem. Soc. 1994, 116, 4077-4078.
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0029860701
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The aldol reaction catalyzed by a bidentate Lewis acid was reported by Maruoka et al. See: Ooi, T.; Takahashi, M.; Maruoka, K. J. Am. Chem. Soc. 1996, 118, 11307-11308.
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