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(b) Perlmutter, P. Conjugate Addition Reactions in Organic Synthesis; Tetrahedron Organic Chemistry, Series 9; Pergamon: Oxford, 1992.
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(a) Feringa, B. L.; Badorrey, R.; Peña, D.; Harutyunyan, S. R.; Minnaard. A. J. Proc. Natl Acad. Sci. U.S.A. 2004, 101, 5834-5838.
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(b) López, F.; Harutyunyan, S. R.; Minnaard, A. J.; Feringa, B. L. J. Am. Chem. Soc. 2004, 126, 12784-12785.
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11
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0034703410
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Besides Feringa group's work (ref 3c), only a Rh-catalyzed asymmetric conjugate addition of aryl boron reagents to α,β-unsaturated esters has been reported. (a) Sakuma, S.; Sakai, M.; Itooka, R.; Miyaura, N. J. Org. Chem. 2000, 65, 5951-5955.
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Besides Feringa group's work (ref 3c), only a Rh-catalyzed asymmetric conjugate addition of aryl boron reagents to α,β-unsaturated esters has been reported. (a) Sakuma, S.; Sakai, M.; Itooka, R.; Miyaura, N. J. Org. Chem. 2000, 65, 5951-5955.
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0033430294
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(b) Takaya, Y.; Senda, T.; Kurushima, H.; Ogasawara, M.; Hayashi, T. Tetrahedron: Asymmetry 1999, 10, 4047-4056.
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Takaya, Y.1
Senda, T.2
Kurushima, H.3
Ogasawara, M.4
Hayashi, T.5
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15
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33846196960
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2, and THF gave the product in lower ee (< 80% ee).
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2, and THF gave the product in lower ee (< 80% ee).
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33846233283
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See Supporting Information
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See Supporting Information.
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33846229126
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3c the desired products were obtained with improved yields and enantioselectivities. (Diagram presented)
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3c the desired products were obtained with improved yields and enantioselectivities. (Diagram presented)
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