N−C Axially Chiral Anilines: Electronic Effect on Barrier to Rotation and A Remote Proton Brake

Yumiko Iwasaki, Ryuichi Morisawa, Satoshi Yokojima, Hiroshi Hasegawa, Christian Roussel, Nicolas Vanthuyne, Elsa Caytan, Osamu Kitagawa

研究成果: Article査読

10 被引用数 (Scopus)

抄録

N-Aryl-N-methyl-2-tert-butyl-6-methylaniline derivatives exhibit a rotationally stable N−C axially chiral structure and the rotational barriers around an N−C chiral axis increased with the increase in electron-withdrawing character of para-substituent on the aryl group. X-ray crystal structural analysis and the DFT calculation suggested that the considerable change of the rotational barriers by the electron effect of para-substituents is due to the disappearance of resonance stabilization energy caused by the twisting of para-substituted phenyl group in the transition state. This structural property of the N−C axially chiral anilines was employed to reveal a new acid-decelerated molecular rotor caused by the protonation at the remote position (remote proton brake).

本文言語English
ページ(範囲)4453-4458
ページ数6
ジャーナルChemistry - A European Journal
24
17
DOI
出版ステータスPublished - 2018 3 20

ASJC Scopus subject areas

  • Catalysis
  • Organic Chemistry

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