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Zhang, W.1
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S. Fustero, A. García Sancho, G. Chiva, J. F. Sanz-Cervera, C. Del Pozo, J. L. Aceña, J. Org. Chem. 2006, 71, 3299-3302.
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J. Org. Chem
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Fustero, S.1
García Sancho, A.2
Chiva, G.3
Sanz-Cervera, J.F.4
Del Pozo, C.5
Aceña, J.L.6
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83
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S. Fustero, S. Catalán, S. Flores, D. Jiménez, C. Del Pozo, J. L. Aceña, J. F. Sanz-Cervera, S. Merida, QSAR Comb. Sci. 2006, 25, 753-760.
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QSAR Comb. Sci
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Fustero, S.1
Catalán, S.2
Flores, S.3
Jiménez, D.4
Del Pozo, C.5
Aceña, J.L.6
Sanz-Cervera, J.F.7
Merida, S.8
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84
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As in the solution and solid-phase versions, when the allylzinc derived from ethyl 2-(bromomethyl)acrylate was used as nucleophile. the fluorous α-methylene γ-lactam 7 was isolated instead of the corresponding α-amino ester.
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As in the solution and solid-phase versions, when the allylzinc derived from ethyl 2-(bromomethyl)acrylate was used as nucleophile. the fluorous α-methylene γ-lactam 7 was isolated instead of the corresponding α-amino ester.
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85
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84989499447
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2O did not work for the fluorous ester hydrolysis. Different transesterification methods such as the reaction with titanium tetraisopropoxide and isopropanol (D. Seebach, E. Hungerbühler, R. Naef, P. Schnurrenberger, B. Weidman, M. Züger, Synthesis 1982, 138-141)
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2O did not work for the fluorous ester hydrolysis. Different transesterification methods such as the reaction with titanium tetraisopropoxide and isopropanol (D. Seebach, E. Hungerbühler, R. Naef, P. Schnurrenberger, B. Weidman, M. Züger, Synthesis 1982, 138-141)
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86
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0001144457
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or the reaction with benzyl bromide in the presence of 3-chloro-1-hydroxytetrabutyldistannoxane (CHTD) [a) J. Otera, T. Yano, R. Okawa, Organometallics 1986, 5, 1167-1170;
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or the reaction with benzyl bromide in the presence of 3-chloro-1-hydroxytetrabutyldistannoxane (CHTD) [a) J. Otera, T. Yano, R. Okawa, Organometallics 1986, 5, 1167-1170;
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87
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33751500481
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J. Otera, N. Dan-oh, H. Nozaki, J. Org. Chem. 1991, 56, 5307-5311] as catalyst also failed to remove the fluorous tag. In all these attempts, only starting material 19b was recovered unchanged.
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b) J. Otera, N. Dan-oh, H. Nozaki, J. Org. Chem. 1991, 56, 5307-5311] as catalyst also failed to remove the fluorous tag. In all these attempts, only starting material 19b was recovered unchanged.
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88
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0003405157
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The 2-(trimethylsilyl)ethyl group is widely employed for the protection of carboxylic acids because it is easily removed upon treatment with TBAF See:, 3rd. ed, Thieme. Stuttgart
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The 2-(trimethylsilyl)ethyl group is widely employed for the protection of carboxylic acids because it is easily removed upon treatment with TBAF (See: P. J. Kocienski, Protecting Groups, 3rd. ed., Thieme. Stuttgart, 2005).
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(2005)
Protecting Groups
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Kocienski, P.J.1
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