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Please see the Supporting Information for details
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Please see the Supporting Information for details.
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21
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53549122965
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Under the optimized reaction conditions (-)-11 is readily purified by crystallization, which allows the preparation of (-)-11 on a greater than 20-gram scale with equal efficiency and without the use of flash chromatography.
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Under the optimized reaction conditions (-)-11 is readily purified by crystallization, which allows the preparation of (-)-11 on a greater than 20-gram scale with equal efficiency and without the use of flash chromatography.
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22
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53549090110
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This bromination reaction was more selective (12/13, 16:84) in favor of the exo-diastereomer when performed at -40°C. Alternatively, bromination reactions conducted at 40°C led to a slight excess (12/13, 52:48) of the endo diastereomer contaminated with by-products arising from bromination of the aniline ring
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This bromination reaction was more selective (12/13, 16:84) in favor of the exo-diastereomer when performed at -40°C. Alternatively, bromination reactions conducted at 40°C led to a slight excess (12/13, 52:48) of the endo diastereomer contaminated with by-products arising from bromination of the aniline ring.
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23
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53549088281
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2Ph was most effective compared to other sulfonyl derivatives (>5).
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2Ph was most effective compared to other sulfonyl derivatives (>5).
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24
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0000658340
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a) M. Aresta, M. Rossi, A. Sacco, Inorg. Chim. Acta 1969, 3, 227;
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Aresta, M.1
Rossi, M.2
Sacco, A.3
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26
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53549104360
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2Ph) product, as well as products (ca. 15%) consistent with radical disproportionation.
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2Ph) product, as well as products (ca. 15%) consistent with radical disproportionation.
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