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0032499049
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We have succeeded in the development of other useful PTC-catalyzed reactions
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0344454818
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note
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Use of α-bromo ketones as substrate instead of chloro ketones gave 3aa with significantly lower enantio- and diastereo-selectivities.
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13
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0345317754
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note
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2, 17% ee].
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14
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0000344872
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K. B. Lipkowitz, M. W. Cavanaugh, B. Baker and M. J. O'Donnell, J. Org. Chem., 1991, 56, 5181; D. L. Hughes, U.-H. Dolling, K. M. Ryan, E. F. Schoenewaldt and E. J. Grabowski, J. Org. Chem., 1987, 52, 4745; M. Masui, A. Ando and T. Shioiri, Tetrahedron Lett., 1988, 29, 2835.
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0000359801
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K. B. Lipkowitz, M. W. Cavanaugh, B. Baker and M. J. O'Donnell, J. Org. Chem., 1991, 56, 5181; D. L. Hughes, U.-H. Dolling, K. M. Ryan, E. F. Schoenewaldt and E. J. Grabowski, J. Org. Chem., 1987, 52, 4745; M. Masui, A. Ando and T. Shioiri, Tetrahedron Lett., 1988, 29, 2835.
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0344023640
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note
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iOH, 20:1, retention time, 16.9 (major) and 18.6 min (minor).
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18
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0010077452
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and references cited therein
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