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For additional examples: (a) Williams, D. R.; Brooks, D. A.; Meyer, K. G.; Clark, M. P. Tetrahedron Lett. 1998, 39, 7251. (b) Williams, D. R.; Brooks, D. A.; Berliner, M. A. J. Am. Chern. Soc. 1999, 121, 4924. (c) Williams, D. R.; Meyer, K. G. J. Am. Chem. Soc. 2001, 123, 765.
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Williams, D.R.1
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For additional examples: (a) Williams, D. R.; Brooks, D. A.; Meyer, K. G.; Clark, M. P. Tetrahedron Lett. 1998, 39, 7251. (b) Williams, D. R.; Brooks, D. A.; Berliner, M. A. J. Am. Chern. Soc. 1999, 121, 4924. (c) Williams, D. R.; Meyer, K. G. J. Am. Chem. Soc. 2001, 123, 765.
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For additional examples: (a) Williams, D. R.; Brooks, D. A.; Meyer, K. G.; Clark, M. P. Tetrahedron Lett. 1998, 39, 7251. (b) Williams, D. R.; Brooks, D. A.; Berliner, M. A. J. Am. Chern. Soc. 1999, 121, 4924. (c) Williams, D. R.; Meyer, K. G. J. Am. Chem. Soc. 2001, 123, 765.
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(a) Williams, D. R.; Kissel, W. S.; Li, J. J. Tetrahedron Lett. 1998, 39, 8593.
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(b) Williams, D. R.; Kissel, W. S.; Li, J. J., Mullins, R. J. Tetrahedron Lett. 2002, 43, 3723.
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(c) Nicolas, E.; Russell, K. C.; Hruby, V. J. J. Org. Chem. 1993, 58, 766.
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Nicolas, E.1
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19
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0346017316
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see ref 5a
-
The stereochemistry of 7 was assigned by protodesilyation and comparison with known material (see ref 5a).
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20
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84981948207
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Scheffold, R.; Saladin, E. Angew. Chem., Int. Ed. Engl. 1972, 11, 229. For a recent application, see: Harmata, M.; Bohnert, G. J. Org. Lett. 2003, 5, 59.
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0347908764
-
-
note
-
Our molecular modelling indicates nonbonded interactions of the axially disposed aldehydic H and the sulfonyl oxygens in 16.
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-
-
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27
-
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0347908763
-
-
In press
-
Stereogenecity in the starting stannane, which positions a chiral center at the β-carbon of the C-2 appendage with respect to the allyl nucleophile (or is more remote), does not affect the diastereofacial selectivity imposed by the auxiliary. For a full account of this work, see: Williams, D. R.; Meyer, K. G.; Shamim, K.; Patnaik, S. Can. J. Chem. In press.
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3/H interaction: Hoffmann, R. W. Chem. Rev. 1989, 89, 1841.
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(a) Terashima, S.; Tanno, N.; Koga, K. J. Chem. Soc., Chem Commun. 1980, 1026.
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0036644261
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This stereochemical outcome is anticipated. For recent examples from these laboratories, see: (a) Williams, D. R.; Mi, L.; Mullins, R. J.; Stites, R. E. Tetrahedron Lett. 2002, 43, 4841. (b) Williams, D. R.; Heiderbrecht, R. W., Jr. J. Am. Chem. Soc. 2003, 125, 1843.
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Williams, D.R.1
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Stites, R.E.4
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35
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0037442892
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-
This stereochemical outcome is anticipated. For recent examples from these laboratories, see: (a) Williams, D. R.; Mi, L.; Mullins, R. J.; Stites, R. E. Tetrahedron Lett. 2002, 43, 4841. (b) Williams, D. R.; Heiderbrecht, R. W., Jr. J. Am. Chem. Soc. 2003, 125, 1843.
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37
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0346267223
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(b) Mathre, D. J.; Jones, T. K.; Xavier, L. C.; Blacklock, T. J.; Reamer, R. A.; Mohan, J. J.; Jones, E. T. T.; Hoogsteen, K.; Baum, M. W.; Grabowski, E. J. J. J. Org. Chem. 1991, 56, 751.
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Grabowski, E.J.J.10
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38
-
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0346648344
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see ref 10
-
The stereochemistry of the major (17R)-diastereomer was confirmed by modified Mosher ester analysis (see ref 10).
-
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39
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0021512929
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Noyori, R.; Tomino, I.; Tanimoto, Y.; Nishizawa, M. J. Am. Chem. Soc. 1984, 106, 6709; 6717.
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-
43
-
-
0346017315
-
-
note
-
Yamaguchi conditions also led to small amounts (5-15%) of the [3.3.1]-bicyclic lactone i, which can be recycled to the seco-acid 23 via KOH, aqueous methanol. (Equation Presented)
-
-
-
-
44
-
-
0347908762
-
-
see ref 3b
-
5 tetrahydropyranone; for direct comparison with a sample independently prepared from our first generation strategy, see ref 3b.
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