Next Article in Journal
A New Poly-substituted Benzaldehyde from the Leaves of Lysimachia fordiana Oliv.
Previous Article in Journal
Synthesis, Characterization, and Saccharide Binding Studies of Bile Acid − Porphyrin Conjugates
Molecules 2007, 12(1), 25-42; doi:10.3390/12010025

An Efficient Synthesis and Reactions of Novel Indol-ylpyridazinone Derivatives with Expected Biological Activity

Chemistry Department, Girls College of Science, P.O. Box 838, Dammam-31113, Saudi Arabia
Received: 29 October 2006 / Revised: 9 December 2006 / Accepted: 18 December 2006 / Published: 10 January 2007
View Full-Text   |   Download PDF [120 KB, uploaded 18 June 2014]   |   Browse Figures


Reaction of 4-anthracen-9-yl-4-oxo-but-2-enoic acid (1) with indole gave the corresponding butanoic acid 2. Cyclocondensation of 2 with hydrazine hydrate, phenyl hydrazine, semicarbazide and thiosemicarbazide gave the pyridazinone derivatives 3a-d. Reaction of 3a with POCl3 for 30 min gave the chloropyridazine derivative 4a, which was used to prepare the corresponding carbohydrate hydrazone derivatives 5a-d. Reaction of chloropyridazine 4a with some aliphatic or aromatic amines and anthranilic acid gave 6a-f and 7, respectively. When the reaction of the pyridazinone derivative 3a with POCl3 was carried out for 3 hr an unexpected product 4b was obtained. The structure of 4b was confirmed by its reaction with hydrazine hydrate to give hydrazopyridazine derivative 9, which reacted in turn with acetyl acetone to afford 10. Reaction of 4b with methylamine gave 11, which reacted with methyl iodide to give the trimethylammonium iodide derivative 12. The pyridazinone 3a also reacted with benzene- or 4-toluenesulphonyl chloride to give 13a-b and with aliphatic or aromatic aldehydes to give 14a-g. All proposed structures were supported by IR, 1H-NMR, 13C-NMR, and MS spectroscopic data. Some of the new products showed antibacterial activity.
Keywords: Substituted pyridazinones;chloropyridazine;anthracene;indole;anti-bacterial activity Substituted pyridazinones; chloropyridazine; anthracene; indole; anti-bacterial activity
This is an open access article distributed under the Creative Commons Attribution License (CC BY 3.0).

Share & Cite This Article

Further Mendeley | CiteULike
Export to BibTeX |
EndNote |
MDPI and ACS Style

Abubshait, S.A. An Efficient Synthesis and Reactions of Novel Indol-ylpyridazinone Derivatives with Expected Biological Activity. Molecules 2007, 12, 25-42.

View more citation formats

Related Articles

Article Metrics

For more information on the journal, click here


[Return to top]
Molecules EISSN 1420-3049 Published by MDPI AG, Basel, Switzerland RSS E-Mail Table of Contents Alert