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4544382328
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This beneficial effect of water has been observed in other amino acid catalyzed C-C bond-forming reactions. See: A.I. Nyberg, A. Usano, and P. Pihko Synlett 2004 1891
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85030794663
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note
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4, filtered and concentrated. The pure protected sugars 2 were obtained by silica gel column chromatography (toluene/EtOAc mixtures)
-
-
-
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63
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85030797737
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-
note
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+: calcd 303.1208)
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64
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85030796187
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-
note
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+: calcd 283.2734)
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65
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0034721440
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68
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0037028924
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72
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0037028990
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Aldehydes as donors see: A. Córdova, S.-i. Watanabe, F. Tanaka, W. Notz, and C.F. Barbas III J. Am. Chem. Soc. 124 2002 1866
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81
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85030793421
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-
note
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4, filtered and concentrated. The pure protected sugars 3 were obtained by silica gel column chromatography (toluene/EtOAc mixtures)
-
-
-
-
82
-
-
85030800081
-
-
note
-
+: calcd 408.1787)
-
-
-
-
83
-
-
85030800723
-
-
note
-
+: calcd 388.1736)
-
-
-
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