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Binkley, J.S.28
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Head-Gordon, M.32
González, C.33
Pople, J.A.34
more..
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69
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0005220657
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note
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It is worth noting that isopropylmagnesium chloride did not promote reduction of the C=N bond of (S)-1b, in sharp contrast with the reactions between isopropylmagnesium halides and N-alkoxycarbonyl imines of trifluoropyruvate, in which 40% of reduction occurs (see ref. [5a]).
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70
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0005127169
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note
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The ee values were determined by chiral HPLC analysis of both enantiomers of sulfinamides 12 and 13, performed with a Chiralcel OD column, using n-hexane/isppropyl alcohol, 85:15, as eluent, with a flow rate of 0.8 mL/min.
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71
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0005162367
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note
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2 through the solvent, or adding traces of water, did not produce any conclusion. However, this undesired event turned out to be useful, because crystallization of sulfinamides 12 and 13 of low ee occurs much more effectively, providing diastereomerically pure racemic crystals suitable for X-ray diffraction, while sulfinamides of high ee were much less prone to crystallization.
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73
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0031579418
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N2-type displacement at sulfur: P. Moreau, M. Essiz, J. Y. Mérour, D. Bouzard, Tetrahedron: Asymmetry 1997, 8, 591-598.
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Moreau, P.1
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74
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D. R. J. Hose, M. F. Mahon, K. C. Molloy, T. Raynham, M. Wills, J. Chem. Soc., Perkin Trans. 1 1996, 691-703.
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Hose, D.R.J.1
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75
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[33a] T. Fujisawa, Y. Kooriyama, M. Shimizu, Tetrahedron Lett. 1996, 37, 3881-3884.
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Fujisawa, T.1
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76
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0000945611
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[33b] Y. Yamamoto, S. Nishii, K. Maruyama, T. Komatsu, W. Ito, J. Am. Chem. Soc. 1986, 108, 7778-7786 and references therein.
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77
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[35b] M. Hulce, J. P. Mallamo, L. L. Frye, T. P. Kogan, G. H. Posner, Org. Synth. 1986, 64, 196-206.
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80
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0000011350
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81
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M. Mikolajczyk, J. Drabowicz, B. Bujnicki, J. Chem. Soc., Chem. Commun. 1976, 568-569.
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82
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85088883070
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note
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2 hybridization and intermolecular hydrogen bonds involve the amidic hydrogen with the sulfoxide oxygen. The two independent molecules in the crystal of 12d exhibit only marginal but significant differences (5-10°) in torsion angles, suggesting that the structure determined is close to the minimum energy conformation.
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84
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85088882553
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[12]
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[12]
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85
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0027608975
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A. Altomare, G. Cascarano, A. Guagliardi, J. Appl. Cryst. 1993, 26, 343-350.
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Altomare, A.1
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