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0041872614
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4, and evaporated under reduced pressure. The residue was passed through a column of basic alumina using degassed ether. The eluent was evaporated to leave practically pure phosphine or phosphine-borane
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4, and evaporated under reduced pressure. The residue was passed through a column of basic alumina using degassed ether. The eluent was evaporated to leave practically pure phosphine or phosphine-borane.
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29
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0041872615
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1/2 (20 °C) = 9.7 y. These results indicate that the formed phosphine itself is stereochemically stable under these reaction conditions in the reaction system
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1/2 (20 °C) = 9.7 y. These results indicate that the formed phosphine itself is stereochemically stable under these reaction conditions in the reaction system.
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0042373630
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4 under the same conditions resulted in recovery of the starting phosphine oxide
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4 under the same conditions resulted in recovery of the starting phosphine oxide.
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(a) Imamoto, T.; Watanabe, J.; Wada, Y.; Masuda, H.; Yamada, H.; Tsuruta, H.; Matsukawa, S.; Yamaguchi, K. J. Am. Chem. Soc. 1998, 120, 1635-1636.
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(b) Yamano, T.; Taya, N.; Kawada, M.; Huang, T.; Imamoto, T. Tetrahedron Lett. 1999, 40, 2577-2580.
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46
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0034708602
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We have recently reported that both enantiomers of BisP* were synthesized by the use of optically active secondary dialkylphosphine-boranes: Miura, T.; Yamada, H.; Kikuchi, S.; Imamoto, T. J. Org. Chem. 2000, 65, 1877-1880.
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47
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0034641498
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Matsukawa, S.; Sugama, H.; Imamoto, T. Tetrahedron Lett. 2000, 41, 6461-6465.
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Matsukawa, S.1
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Imamoto, T.3
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48
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0041872616
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A very small amount (< 1%) of the meso isomer of 2 was detected by HPLC analysis
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A very small amount (< 1%) of the meso isomer of 2 was detected by HPLC analysis.
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