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85030210657
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note
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13C NMR spectroscopy. Satisfactory combustion and/or HRMS analyses were obtained for all new compounds.
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21
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0012047018
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Helmchen, G., Hoffmann, R. W., Mulzer, J. and Schaumann, E., Eds.; Thieme: Stuttgart
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11. Kallmerten, J. in Houben Weyl Methods in Organic Chemistry, Vol. E 21d, Stereoselective Synthesis, Helmchen, G., Hoffmann, R. W., Mulzer, J. and Schaumann, E., Eds.; Thieme: Stuttgart, 1995, 3810.
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Houben Weyl Methods in Organic Chemistry, Vol. E 21d, Stereoselective Synthesis
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Kallmerten, J.1
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22
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85030203424
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note
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12. Such a mechanism is consistent with our stereochemical assignment for 13, which is based on the H3-H4 coupling constant of 7.2 Hz indicative of a cis relationship between the C3 and C4 substituent. An alternative mechanism, involving [1,2] migration of the C2-C3 bond of 11b with concomittant displacement of the C4 hydroxyl, would yield the C3 epimer of 13. Studies aimed at defining the scope and mechanism of this unusual pyranose rearrangement are in progress.
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24
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0012019575
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(b) Binkley, R. W. and Sivik, M. R., J. Carbohydrate Chem. 1986, 5, 647. Binkley, R. W., Sivik, M. R., J. Org Chem. 1986, 51, 2619.
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Binkley, R.W.1
Sivik, M.R.2
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0012019576
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(b) Binkley, R. W. and Sivik, M. R., J. Carbohydrate Chem. 1986, 5, 647. Binkley, R. W., Sivik, M. R., J. Org Chem. 1986, 51, 2619.
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Binkley, R.W.1
Sivik, M.R.2
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27
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85030206646
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note
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15. The 500 MHz NMR, IR and FAB low resolution mass spectra of 17 corresponded to spectra of authentic material kindly provided by Prof. Rinehart.
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