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For recent approaches see: (a) Hwang, Y. C.; Fowler, F. J. Org. Chem. 1985, 50, 2719. (b) Hwang, Y. C.; Chu, M.; Fowler, F. J. Org. Chem. 1985, 50, 0, 3885. (c) Yasuda, S.; Hanaoka, M.; Arata, Y. Chem. Pharm. Bull. 1980, 28, 831. (d) Szychowski, J.; Leniewski, A.; Wrobel, J. T. Chem. Ind. (London) 1978, 273.
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For recent approaches see: (a) Hwang, Y. C.; Fowler, F. J. Org. Chem. 1985, 50, 2719. (b) Hwang, Y. C.; Chu, M.; Fowler, F. J. Org. Chem. 1985, 50, 0, 3885. (c) Yasuda, S.; Hanaoka, M.; Arata, Y. Chem. Pharm. Bull. 1980, 28, 831. (d) Szychowski, J.; Leniewski, A.; Wrobel, J. T. Chem. Ind. (London) 1978, 273.
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11844287901
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note
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The relative stereochemistry of 12 was assigned by X-ray crystallography. Crystallographic data for 12 have been deposited with the CCDC as Supplementary Publication Number CCDC 210220.
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20
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0028200030
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Related alkylation products have been observed in [3 + 2] cycloaddition reactions: (a) Trost, B. M.; Chan, D. M. T. J. Am. Chem. Soc. 1983, 105, 2315. (b) Naz, N.; Al-Tel, T. H.; Al-Abed, Y.; Voelter W.; Ficker, R.; Hiller, W. J. Org. Chem. 1996, 61, 3250
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Related alkylation products have been observed in [3 + 2] cycloaddition reactions: (a) Trost, B. M.; Chan, D. M. T. J. Am. Chem. Soc. 1983, 105, 2315. (b) Naz, N.; Al-Tel, T. H.; Al-Abed, Y.; Voelter W.; Ficker, R.; Hiller, W. J. Org. Chem. 1996, 61, 3250
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26
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11844305243
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note
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We investigated various analogues of 17 bearing TBDPS, TES ethers, and acetate, but these showed similar reactivities.
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27
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0002907091
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3 and further COSY and NOESY experiments were carried out that confirmed the stereochemistry of 3 as that depicted in Chart 1. These data are described in full in the Supporting Information.
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0001716399
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