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(a) Itoh T., Matsuya Y., Enomoto Y., Nagata K., Miyazaki M., Ohsawa A. Synlett. 1999;1799
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A preliminary communication
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A preliminary communication Itoh T., Nagata K., Yokoya M., Miyazaki M., Ikeda S., Matsuya Y., Enomoto Y., Ohsawa A. Synlett. 2001;1005.
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85031185718
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For instance, the addition of (S)-alanine derivatives to N-9 position of β-carboline resulted in the formation of 9-alanyl derivatives in yields below 20% under standard conditions
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For instance, the addition of (S)-alanine derivatives to N-9 position of β-carboline resulted in the formation of 9-alanyl derivatives in yields below 20% under standard conditions.
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26
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0030026261
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0004082390
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Silyl enol ethers were synthesized according to the reported method, see: San Diego: Academic. pp 99-105, and references cited therein
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Silyl enol ethers were synthesized according to the reported method, see: Colvin E.W. Silicon Reagents in Organic Synthesis. 1988;Academic, San Diego. pp 99-105, and references cited therein.
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Silicon Reagents in Organic Synthesis
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Colvin, E.W.1
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85031185862
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In the previous reaction which adopted N-phenylsulfonylprolinyl group as a chiral auxiliary, addition using silyl enol ethers afforded the products in good yields but poor diastereoselectivity (<20%)
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In the previous reaction which adopted N-phenylsulfonylprolinyl group as a chiral auxiliary, addition using silyl enol ethers afforded the products in good yields but poor diastereoselectivity (<20%).
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32
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0032805195
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The coordination mechanism was supposed to participate only in the reaction of β-carbolines which have two carbonyl and/or sulfonyl oxygens at the reaction sites. In the cases of isoquinoline derivatives, only the steric factor might control the stereochemistry; see (a) Itoh T., Nagata K., Miyazaki M., Ohsawa A. Synlett. 1999;1154 (b) Itoh T., Nagata K., Miyazaki M., Kameoka K., Ohsawa A. Tetrahedron. 57:2001;8827 (c) Nagata K., Itoh T., Kameoka K., Miyazaki M., Ohsawa A. Heterocycles. 55:2001;2269.
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Itoh, T.1
Nagata, K.2
Miyazaki, M.3
Ohsawa, A.4
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33
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0035887534
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The coordination mechanism was supposed to participate only in the reaction of β-carbolines which have two carbonyl and/or sulfonyl oxygens at the reaction sites. In the cases of isoquinoline derivatives, only the steric factor might control the stereochemistry; see (a) Itoh T., Nagata K., Miyazaki M., Ohsawa A. Synlett. 1999;1154 (b) Itoh T., Nagata K., Miyazaki M., Kameoka K., Ohsawa A. Tetrahedron. 57:2001;8827 (c) Nagata K., Itoh T., Kameoka K., Miyazaki M., Ohsawa A. Heterocycles. 55:2001;2269.
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Tetrahedron
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Itoh, T.1
Nagata, K.2
Miyazaki, M.3
Kameoka, K.4
Ohsawa, A.5
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34
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0035697176
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The coordination mechanism was supposed to participate only in the reaction of β-carbolines which have two carbonyl and/or sulfonyl oxygens at the reaction sites. In the cases of isoquinoline derivatives, only the steric factor might control the stereochemistry; see (a)
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The coordination mechanism was supposed to participate only in the reaction of β-carbolines which have two carbonyl and/or sulfonyl oxygens at the reaction sites. In the cases of isoquinoline derivatives, only the steric factor might control the stereochemistry; see (a) Itoh T., Nagata K., Miyazaki M., Ohsawa A. Synlett. 1999;1154 (b) Itoh T., Nagata K., Miyazaki M., Kameoka K., Ohsawa A. Tetrahedron. 57:2001;8827 (c) Nagata K., Itoh T., Kameoka K., Miyazaki M., Ohsawa A. Heterocycles. 55:2001;2269.
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Heterocycles
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Nagata, K.1
Itoh, T.2
Kameoka, K.3
Miyazaki, M.4
Ohsawa, A.5
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35
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85031183069
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When 3 equiv. of HMPA was added to the reaction shown in entry 6 of Table 3, the ee was lowered to 50%
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When 3 equiv. of HMPA was added to the reaction shown in entry 6 of Table 3, the ee was lowered to 50%.
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36
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0037159696
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Enantioselective synthesis of an alkaloid and an alkaloid derivative was carried out using the product described in the present paper, see:
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Enantioselective synthesis of an alkaloid and an alkaloid derivative was carried out using the product described in the present paper, see: Itoh T., Miyazaki M., Nagata K., Yokoya M., Nakamura S., Ohsawa A. Heterocycles. 58:2002;115.
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(2002)
Heterocycles
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, pp. 115
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Itoh, T.1
Miyazaki, M.2
Nagata, K.3
Yokoya, M.4
Nakamura, S.5
Ohsawa, A.6
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