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For the synthesis of racemic or achiral α,α-disubstituted amines see: (a) Barbot, F.; Miginiac, L. Synth. Commun. 1997, 27, 2601-2614. (b) Calderwood, D. J.; Davies, R. V.; Rafferty, P.; Twigger, H. L.; Whelan, H. M. Tetrahedron Lett. 1997, 38, 1241-1244. (c) Ciganek, E. J. Org. Chem. 1992, 57, 4521-4527. (d) Charette, A. B.; Gagnon, A.; Janes, M.; Mellon, C. Tetrahedron Lett. 1998, 39, 5147-5150.
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For the synthesis of racemic or achiral α,α-disubstituted amines see: (a) Barbot, F.; Miginiac, L. Synth. Commun. 1997, 27, 2601-2614. (b) Calderwood, D. J.; Davies, R. V.; Rafferty, P.; Twigger, H. L.; Whelan, H. M. Tetrahedron Lett. 1997, 38, 1241-1244. (c) Ciganek, E. J. Org. Chem. 1992, 57, 4521-4527. (d) Charette, A. B.; Gagnon, A.; Janes, M.; Mellon, C. Tetrahedron Lett. 1998, 39, 5147-5150.
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0345234317
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unpublished results
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Guangcheng Liu, unpublished results.
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Liu, G.1
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and references therein
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22
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0344803428
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note
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As described in the Supporting Information, 3a is converted to the benzamide, and 3b is converted to the methyl ester of N-benzoyl α-methylvaline.
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23
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0001445607
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