Practical synthesis of P-stereogenic diphosphacrowns

Organic Letters

Volumn 11, Issue 11, 2009, Pages 2241-2244

  Morisaki, Yasuhiro ^a   Imoto, Hiroaki ^a   Tsurui, Kazuhiko ^a   Chujo, Yoshiki ^a  

^a KYOTO UNIVERSITY   (Japan)

Author keywords

[No Author keywords available]

Indexed keywords

EID: 66149190561     PISSN: 15237060     EISSN: None     Source Type: Journal    
DOI: 10.1021/ol900504e     Document Type: Article

References (36)

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24. Cyclic diphosphines with a small ring size are reviewed, see: (a) Alder, R. W.; Canter, C.; Gil, M.; Gleiter, R.; Harris, C. J.; Harris, S. E.; Lange, H.; Orpen, A. G.; Taylor, P. N. J. Chem. Soc., Perkin Trans. 1 1998, 1643-1655. See also as a recent example:
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29. This compound was synthesized on the basis of the procedure reported in the literature by Ohashi, Imamoto, and co-workers: (a) Ohashi, A.; Kikuchi, S.; Yasutake, M.; Imamoto, T. Eur. J. Org. Chem. 2002, 2535-2546. The ee value was determined by HPLC with Daicel Chiralcel OD-H column, as shown in Figure S1.
30. Its optical purity (°99% ee) was confirmed by HPLC with Daicel Chiralcel OD-H column, as shown in Figure S2.
31. See Supporting Information.
32. 3 exhibits a sharp single signal with a P-B coupling, as shown in Figure S8.
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