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0014938280
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Albrecht, H.P.1
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0010501828
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4. For efficient synthesis of 3: (a) Yokomatsu, T.; Shimizu, T.; Yuasa, Y.; Shibuya, S. Synlett 1995, 1279.
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Yokomatsu, T.1
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0029585983
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5. For reviews of N-glycosylations: Wilson, L. J.; Hager, M. W.; El-Kattan, Y. A.; Liotta, D. C. Synthesis 1995, 1465. N-Glycosylation reactions of glycosyl donors of type 3 with a modest diastereoselectivity were briefly reported: Lau, W. Y.; Zhang, L.; Cheng, D.; Wang, J.; Zhao, K. Thetrahedron Lett. 1996, 37, 4297.
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5. For reviews of N-glycosylations: Wilson, L. J.; Hager, M. W.; El-Kattan, Y. A.; Liotta, D. C. Synthesis 1995, 1465. N-Glycosylation reactions of glycosyl donors of type 3 with a modest diastereoselectivity were briefly reported: Lau, W. Y.; Zhang, L.; Cheng, D.; Wang, J.; Zhao, K. Thetrahedron Lett. 1996, 37, 4297.
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6. Vorbrüggen, H.; Kroilkiewicz, K.; Bennua, B. Chem. Ber. 1981, 114, 1234. Vorbrüggen. H. Acc. Chem. Res. 1995, 28, 509.
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Vorbrüggen, H.1
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20
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0010502662
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note
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31P-NMR, IR and MS analyses.
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-
-
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21
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0010527917
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note
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3); relatively strong correlations between the protons on benzoyl and the l-ethoxy functional groups were observed with 10a,b.
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-
-
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22
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0010502061
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note
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9. The benzoyl protecting group of 8a,b was found to be a good directing functionality to induce complete diastereoselectivity (>99% de) under the conditions. See ref. 4a for a comparison.
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-
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23
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0025817098
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10. Recent examples for neighboring group participation of the thiocarbonyl functionality at the 3-position: (a) Lavallee, J.-F.; Just, G. Tetrahedron Lett. 1991, 32, 3469.
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Tetrahedron Lett.
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Lavallee, J.-F.1
Just, G.2
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24
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0030532975
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(b) Mukaiyama, T.; Hirano, N.; Nishida, M.; Uchiro, H. Chem. Lett. 1996, 99.
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Mukaiyama, T.1
Hirano, N.2
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Uchiro, H.4
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25
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0030506198
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(c) Mukaiyama, T.; Uchiro, T.; Hirano, N.; Ishikawa, T. Chem. Lett. 1996, 629.
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Mukaiyama, T.1
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Ishikawa, T.4
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26
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0010502062
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note
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11. The bond lengths are based on MM 2 calculation with CAChe Worksystem (SONY/Tektronix Corporation).
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-
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27
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0010500116
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note
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++thy).
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