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Sridharan M, Prasad KJ, Zeller M. 2,2,9-Trimethyl-2,3-dihydro-pyrano[2,3-a]carbazol-4-(11H)-one. Acta Crystallogr Sect E Struct Rep Online. 2008;64:o2156doi: 10.1107/S1600536808033850.
Sridharan, M., Prasad, K. J., & Zeller, M. (2008). 2,2,9-Trimethyl-2,3-dihydro-pyrano[2,3-a]carbazol-4-(11H)-one. Acta crystallographica. Section E, Structure reports online, 64o2156. https://doi.org/10.1107/S1600536808033850
Sridharan, Makuteswaran, et al. "2,2,9-Trimethyl-2,3-dihydro-pyrano[2,3-a]carbazol-4-(11H)-one." Acta crystallographica. Section E, Structure reports online vol. 64 (2008): o2156. doi: https://doi.org/10.1107/S1600536808033850
Sridharan M, Prasad KJ, Zeller M. 2,2,9-Trimethyl-2,3-dihydro-pyrano[2,3-a]carbazol-4-(11H)-one. Acta Crystallogr Sect E Struct Rep Online. 2008 Oct 22;64:o2156. doi: 10.1107/S1600536808033850. PMID: 21581016; PMCID: PMC2959763.
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Acta Crystallogr Sect E Struct Rep Online. 2008 Oct 22;64:o2156. doi: 10.1107/S1600536808033850.

2,2,9-Trimethyl-2,3-dihydro-pyrano[2,3-a]carbazol-4-(11H)-one.

Acta crystallographica. Section E, Structure reports online

Makuteswaran Sridharan, Karnam J Rajendra Prasad, Matthias Zeller

PMID: 21581016 PMCID: PMC2959763 DOI: 10.1107/S1600536808033850

Abstract

The title compound, C(18)H(17)NO(2), was prepared from 1-hydr-oxy-7-methyl-carbazole and 3,3-dimethyl-acrylic acid with trifluoro-acetic acid as the cyclization catalyst. The mol-ecules contain an essentially planar 6-methyl-indole unit. The second aromatic ring is significantly bent away from the plane of this unit, with maximum deviations of 0.171 (1) and 0.185 (1) Å for two of the C atoms. In the crystal structure, there are neither N-H⋯O hydrogen bonds nor π-π stacking between the aromatic sections of neighboring mol-ecules. There is only one weak C-H⋯O hydrogen bond and a number of weak C-H⋯π inter-actions.

References

  1. Chem Rev. 2002 Nov;102(11):4303-427 - PubMed
  2. Acta Crystallogr A. 2008 Jan;64(Pt 1):112-22 - PubMed
  3. Acta Crystallogr Sect E Struct Rep Online. 2008 Oct 22;64(Pt 11):o2155 - PubMed
  4. Acta Crystallogr Sect E Struct Rep Online. 2008 Oct 22;64(Pt 11):o2157 - PubMed

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