Molbank 2005, M438

http://www.mdpi.net/molbank/

 

Synthesis of (4-chlorobenzylidene)-(2-chloropyridi-3-yl)amine

 

A. A. jarrahpour* and M. Zarei

 

Department of Chemistry, College of Sciences, Shiraz University,

Shiraz 71454, Iran

Tel. 0098 711 2284822,  Fax: 0098 711 2280926, e-mail: [email protected], [email protected]

 

Received: 2 June 2005 / Accepted: 22 September 2005 / Published: 1 October 2005

 

Keywords: Schiff bases , 3-amino-2-chloropyridine , p-chlorobenzaldehyde , biological activity .

 

Schiff bases are widely in use for synthetic purposes both by organic and inorganic chemists.1 They are used as biological, analytical, polymer and liquid crystalline materials.2 Schiff bases are reported to show a variety of biological activities such as antibacterial3-5, antifungal6-7, anticancer 8-9 and herbicidal 10 activities . Pyridinium compounds have biological activities11 such as antifungal12 and antibacterial12-13 activities. The presence of a chloro moiety in different types of compounds causes them to exhibit pesticidal activity.10

 

  

A mixture of 3-amino-2-chloro pyridine 1 (1.28 g, 10 mmol), 4-chlorobenzaldehyde 2 (1.40 g, 10 mmol) and anhydrous sodium sulfate (4.00 g) in dry dichloromethane (40.00 mL) was stirred at room temperature for seven hours. The suspension was filtered and washed with dichloromethane. The solvent was evaporated and new schiff base 3 was formed, which was washed with 10 mL acetic acid 5%, 10 mL NaHCO3 5% and water, successively, (2.04 g, 82 %).

 

Melting point: 54-56oC.

 

IR (KBr, cm-1): 1600.1 (CH=N); 1624.0 (C=N pyridine ring).

 

1H-NMR (250MHz, CDCl3): ¦Ä= 6.97-8.17 (7H, m, 2 Ph); 8.31 (1H, s, HC=N).

 

13C-NMR (62.9 MHz, CDCl3): ¦Ä= 123.55-146.49 (aromatic carbons); 162.55 (HC=N).

 

 
 
MS (m/z, %): 251 ([M+], 63.3); 250 (M-1, 100.0); 215 (C5H3NClN=CC6H4 , 14.8); 139 (C5H3NClN=C, 15.4); 112 (C5H3NCl, 52.2 ), 89 (C5H3NN, 19.4); 77 (C5H3N, 15.1).

 

Acknowledgment

The authors thank the Shiraz University Research Council for financial support (Grant No. 83-GR-SC-31and 84-GR-SC-23 ).

 

References

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5.   Afaf. H. El-masry, H. H. Fahmy, S. H. Ali Abdelwahed Molecules 2000, 5, 1429.

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8.   S. B. Desai, P. B. Desai, K. R. Desai Hetrocycl. Commun. 2001, 7 (1), 83.

9.   P. Phatak , V. S. Jolly, K. P.Sharma Orient. J. Chem. 2000, 16 (3), 493.

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11. Kristina Sepcic J. Toxicol., Toxin Rev. 2000, 19 (2), 139.

12. W. Sliwa , B. Mianowska Hetrocycles 1989, 29 (3), 557.

13. I. Durta, R. Dinica, E. Bacu, M. Anderi Chem. Abstr. 2000, 132, 205326b.

 

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