論文

1999年2月3日

Helical chirality induction by point chirality at helix terminal

Journal of the American Chemical Society
  • Tadashi Mizutani
  • ,
  • Shigeyukj Yagi
  • ,
  • Tomoko Morinaga
  • ,
  • Tetsutaro Nomura
  • ,
  • Toru Takagishi
  • ,
  • Susumu Kitagawa
  • ,
  • Hisanobu Ogoshi

121
4
開始ページ
754
終了ページ
759
記述言語
英語
掲載種別
研究論文(学術雑誌)
DOI
10.1021/ja9830849

A series of zinc bilinone derivatives bearing a chiral auxiliary at the helix terminal were prepared to investigate the helical chirality induction in the bilinone framework by the point chirality of the chiral auxiliary. Chiral induction was sensitive to the distance to the asymmetric carbon as well as to substituents on the asymmetric carbon. When the chiral carbon was directly attached to the bilinone 19-oxygen and carried an aromatic group, relatively high helical chirality induction was observed in [19-alkoxy- 2,7,13,18-tetramethyl-3,8,12,17-tetraethyl-1-bilinonato]zinc(II) as demonstrated by variable-temperature 1H NMR and CD studies. The (R)-2- methyl-1-phenylpropanoxy group induced P-helicity in &gt
95% enantiomeric excess at 223 K in CD2Cl2 (ΔΔG°≥ 6.8 kJ/mol).

リンク情報
DOI
https://doi.org/10.1021/ja9830849
URL
https://www.scopus.com/inward/record.uri?partnerID=HzOxMe3b&scp=0033518555&origin=inward
Scopus Citedby
https://www.scopus.com/inward/citedby.uri?partnerID=HzOxMe3b&scp=0033518555&origin=inward
ID情報
  • DOI : 10.1021/ja9830849
  • ISSN : 0002-7863
  • SCOPUS ID : 0033518555

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