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21
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0037059471
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2CHO using l-proline (13a), 13b, and the Xiao's catalyst. However, all reactions gave the desired aldol products in very poor yields (<10%). cf. A. Cordova, W. Notz, and C.F. Barbas III J. Org. Chem. 67 2002 301 303
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2942641357
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31
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50549084610
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33
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78751595040
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The production of 16 can be explained by assuming the following transition states
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The production of 16 can be explained by assuming the following transition states.
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-
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34
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2142858450
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R and significant NOE. cf. Ohtani, I.; Kusumi, T.; Kashman, Y.; Kakisawa, H. J. Am. Chem. Soc. 1991, 113, 4092-4096.
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Ohtani, I.1
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Kakisawa, H.4
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35
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78751577813
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note
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2EtN, rt, 79%).
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