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Volume 2010
Issue 2
10.3390/M684
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Short Note

N-[(9-Ethyl-9H-carbazol-3-yl)methylene]-3,4-dimethylisoxazol-5-amine

by
Abdullah Mohamed Asiri
1,2,*,
Salman A. Khan
1 and
Mohammed G. Rasul
1
1
Chemistry Department, Faculty of Science, King Abdul Aziz University, P.O. Box 80203, Jeddah 21589, Saudi Arabia
2
The Center of Excellence for Advanced Materials Research, King Abdul Aziz University, Jeddah 21589, P.O. Box 80203, Saudi Arabia
*
Author to whom correspondence should be addressed.
Molbank 2010, 2010(2), M684; https://doi.org/10.3390/M684
Submission received: 14 April 2010 / Accepted: 20 May 2010 / Published: 25 May 2010
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Abstract

:
The title compound, N-[(9-ethyl-9H-carbazol-3-yl)methylene]-3,4-dimethyl-isoxazol-5-amine has been synthesized by reaction of 9-ethyl-9H-carbazole-3-carbaldehyde with 5-amino-3,4-dimethylisoxazole in the presence of acetic acid in ethanol. The structure of this new compound was confirmed by elemental analysis, IR, 1H-NMR, 13C-NMR and EI-MS spectral analysis.

Graphical Abstract

Schiff base compounds are generally known due to the azomethine group present. These compounds are usually synthesized by condensation of primary amines and active carbonyl groups. Schiff bases are an important class of compounds in the medicinal and pharmaceutical field. They show biological applications including antibacterial [1], antifungal [2], anticancer [3], anti-inflammatory [4] and antitumor activity [5]. Heterocycle-containing derivatives of Schiff bases are known to possess a variety of biological activities such as CNS depressant, anticancer [6], antibiotic [7], antihistaminic [8], anticonvulsant [9] and many others. Due to the wide application of hetrocyclic Schiff bases, we undertook the synthesis of a new heterocyclic Schiff base from a carbazole aldehyde and 5-amino-3,4-dimethylisoxazole.
Molbank 2010 m684 i001

Experimental

A mixture of 9-ethyl-9H-carbazole-3-carbaldehyde (0.50 g, 0.0022 mol) and 5-amino-3,4-dimethyl-isoxazole (0.36 g, 0.0022 mol) in ethanol (15 mL) was refluxed for 5 h with stirring to give a light yellow precipitate. This material was filtered off and washed with ethanol to give the pure Schiff base. Figure 1a and Figure 1b showed the absorption and emission spectra of compound 3 in chloroform solution.
Yield: 88%; mp: 188–189 οC
EI-MS m/z (rel. int.%): 318 (68) [M + 1]+
IR (KBr) vmax cm-1: 2971 (C-H), 1627 (C=C), 1584 (HC=N), 1126 (C-N).
¹H NMR (CDCl3) δ: 8.16 (d. H1, J = 7.8 Hz), 8.09 (d, H2, J = 8.4 Hz), 8.63 (s, H3), 7.32 (d, H4, J = 7.2 Hz), 7.53 (dd, H5, J = 7.8 Hz), 7.45 (dd, H6, J = 4.8 Hz), 7.29 (d, H7, J = 7.4 Hz), 9.00 (s, H8, CH olefinic), 4.40 (t, N-CH2-CH3, J = 7.2 Hz), 1.48 (q, N-CH2-CH3, J = 8.4 Hz), 2.26 (s, CH3), 2.12 (s, CH3).
Anal. calc. for C20H19N3O: C, 75.69, H, 6.03, N, 13.24. Found: C, 75.66, H, 5.98, N, 13.21.

Supplementary materials

Supplementary File 1Supplementary File 2Supplementary File 3

References

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  9. Viossat, B.; Daran, J.; Savouret, G.; Morgant, G.; Greenaway, F.T.; Dung, N.; Pham-Tran, V.A.; Sorenson, R.J. Low-temperature (180 K) crystal structure, electron paramagnetic resonance spectroscopy, and propitious anticonvulsant activities of CuII2(aspirinate)4(DMF)2 and other CuII2(aspirinate)4 chelates. J. Inorg. Biochem. 2003, 96, 375–385. [Google Scholar] [CrossRef]
Molbank 2010 m684 g001 550
Figure 1. (a) UV-Visible absorption of compound 3; (b) Emission Spectrum of compound 3.
Figure 1. (a) UV-Visible absorption of compound 3; (b) Emission Spectrum of compound 3.
Molbank 2010 m684 g001

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MDPI and ACS Style

Asiri, A.M.; Khan, S.A.; Rasul, M.G. N-[(9-Ethyl-9H-carbazol-3-yl)methylene]-3,4-dimethylisoxazol-5-amine. Molbank 2010, 2010, M684. https://doi.org/10.3390/M684

AMA Style

Asiri AM, Khan SA, Rasul MG. N-[(9-Ethyl-9H-carbazol-3-yl)methylene]-3,4-dimethylisoxazol-5-amine. Molbank. 2010; 2010(2):M684. https://doi.org/10.3390/M684

Chicago/Turabian Style

Asiri, Abdullah Mohamed, Salman A. Khan, and Mohammed G. Rasul. 2010. "N-[(9-Ethyl-9H-carbazol-3-yl)methylene]-3,4-dimethylisoxazol-5-amine" Molbank 2010, no. 2: M684. https://doi.org/10.3390/M684

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