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Volumn 53, Issue 33, 2012, Pages 4332-4336

Studies on rotational barriers of N-C axially chiral compounds: Increase in the rotational barrier by aromatization

Author keywords

Aromatization; Axially chiral; Quinazolinone; Quinolinone; Rotational barrier

Indexed keywords

CARBON; NITROGEN; QUINAZOLINE DERIVATIVE; QUINOLINE DERIVATIVE;

EID: 84864059247     PISSN: 00404039     EISSN: 18733581     Source Type: Journal    
DOI: 10.1016/j.tetlet.2012.06.007     Document Type: Article
Times cited : (21)

References (42)
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    • Typical examples of atropisomeric compounds having an N-C chiral axis: L.H. Bock, and R. Adams J. Am. Chem. Soc. 53 1931 374
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    • Bock, L.H.1    Adams, R.2
  • 10
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    • Tetrahedron Symposium-in-print on Axially Chiral Amides (Atropisomerism)
    • Tetrahedron Symposium-in-print on Axially Chiral Amides (Atropisomerism), J. Clayden, (Ed.), Tetrahedron, 2004, 60, 4325-4558.
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  • 14
    • 0001311958 scopus 로고
    • Typical papers on atropisomeric ortho-tert-butylanilides
    • Typical papers on atropisomeric ortho-tert-butylanilides: D.P. Curran, H. Qi, S.J. Geib, and N.C. DeMello J. Am. Chem. Soc. 116 1994 3131
    • (1994) J. Am. Chem. Soc. , vol.116 , pp. 3131
    • Curran, D.P.1    Qi, H.2    Geib, S.J.3    Demello, N.C.4
  • 23
    • 37049080002 scopus 로고
    • In addition to III-VI, other stable N-C axially chiral aromatic heterocycles (quinolin-2-one and pyridin-2-one) having an N-(ortho-methyl)phenyl group have also been reported.
    • In addition to III-VI, other stable N-C axially chiral aromatic heterocycles (quinolin-2-one and pyridin-2-one) having an N-(ortho-methyl)phenyl group have also been reported. M. Mintas, V. Mihaljevic, H. Koller, D. Schuster, and A. Mannschreck J. Chem. Perkin Trans. 2 1990 619
    • (1990) J. Chem. Perkin Trans. 2 , pp. 619
    • Mintas, M.1    Mihaljevic, V.2    Koller, H.3    Schuster, D.4    Mannschreck, A.5
  • 35
    • 33745438448 scopus 로고    scopus 로고
    • Catalytic enantioselective synthesis of N-C axially chiral compounds by other groups
    • Catalytic enantioselective synthesis of N-C axially chiral compounds by other groups S. Brandes, M. Bella, A. Kjoersgaard, and K.A. Jorgensen Angew. Chem., Int. Ed. 45 2006 1147
    • (2006) Angew. Chem., Int. Ed. , vol.45 , pp. 1147
    • Brandes, S.1    Bella, M.2    Kjoersgaard, A.3    Jorgensen, K.A.4
  • 42
    • 84893169025 scopus 로고
    • DFT calculations at the level of B3LYP1/6-31G(d) were performed by Firefly (PC GAMESS) quantum chemical package (version 7.1.G, Alex A. Granovsky, Firefly version 7.1.G, www http://classic.chem.msu.su/gran/firefly/index.html). All structures were fully optimized and then subjected to the frequency analysis. For the ground state, the absence of the imaginary frequency was confirmed in every case. Transition states relevant to the rotational barrier were identified by the following two criteria: (1) The frequency analysis gave only one imaginary frequency. (2) The exhaustive IRC calculations provided one pair of enantiomeric atropisomers. Schmidt, M. W.; Baldridge, K. K.; Boatz, J. A.; Elbert, S. T.; Gordon, M. S.; Jensen, J. H.; Koseki, S.; Matsunaga, N.; Nguyen, K. A.; Su, S.; Windus, T. L.; Dupuis, M.; Montgomery, J. A.; J. Comput. Chem. 1993, 14, 1347.
    • (1993) J. Comput. Chem. , vol.14 , pp. 1347
    • Schmidt, M.W.1    Baldridge, K.K.2    Boatz, J.A.3    Elbert, S.T.4    Gordon, M.S.5    Jensen, J.H.6    Koseki, S.7    Matsunaga, N.8    Nguyen, K.A.9    Su, S.10    Windus, T.L.11    Dupuis, M.12    Montgomery, J.A.13


* 이 정보는 Elsevier사의 SCOPUS DB에서 KISTI가 분석하여 추출한 것입니다.