Next Article in Journal
Ultrasound Assisted Synthesis of 5,9-Dimethylpentadecane and 5,9-Dimethylhexadecane – the Sex Pheromones of Leucoptera coffeella
Previous Article in Journal
Antibacterial Effect of Five Zingiberaceae Essential Oils
Article Menu

Export Article

Open AccessArticle
Molecules 2007, 12(8), 2061-2079; doi:10.3390/12082061

Microwave Assisted Condensation Reactions of 2-Aryl Hydrazonopropanals with Nucleophilic Reagents and Dimethyl Acetylenedicarboxylate

Department of Chemistry, Girl’s College of Education, Jeddah, P.O. 50918 Jeddah 21533, Kingdom of Saudi Arabia
*
Author to whom correspondence should be addressed.
Received: 16 February 2007 / Revised: 26 May 2007 / Accepted: 1 June 2007 / Published: 24 August 2007
View Full-Text   |   Download PDF [135 KB, uploaded 18 June 2014]   |  

Abstract

The reaction of methyl ketones 1a-g with dimethylformamide dimethylacetal (DMFDMA) afforded the enaminones 2a-g, which were coupled with diazotized aromatic amines 3a,b to give the corresponding aryl hydrazones 6a-h. Condensation of compounds 6a-h with some aromatic heterocyclic amines afforded iminoarylhydrazones 9a-m. Enaminoazo compounds 12a,b could be obtained from condensation of 6c with secondary amines. The reaction of 6e,h with benzotriazolylacetone yielded 14a,b. Also, the reaction of 6a,b,d-f,h with glycine and hippuric acid in acetic anhydride afforded pyridazinone derivatives 17a-f. Synthesis of pyridazine carboxylic acid derivatives 22a,b from the reaction of 6b,e with dimethyl acetylenedicarboxylate (DMAD) in the presence of triphenylphosphine at room temperature is also reported. Most of these reactions were conducted under irradiation in a microwave oven in the absence of solvent in an attempt to improve the product yields and to reduce the reaction times.
Keywords: 2-Arylhydrazonopropanals; heterocyclic amines; active methylene; microwave irradiation 2-Arylhydrazonopropanals; heterocyclic amines; active methylene; microwave irradiation
This is an open access article distributed under the Creative Commons Attribution License (CC BY 3.0).

Scifeed alert for new publications

Never miss any articles matching your research from any publisher
  • Get alerts for new papers matching your research
  • Find out the new papers from selected authors
  • Updated daily for 49'000+ journals and 6000+ publishers
  • Define your Scifeed now

SciFeed Share & Cite This Article

MDPI and ACS Style

Al-Zaydi, K.M.; Borik, R.M. Microwave Assisted Condensation Reactions of 2-Aryl Hydrazonopropanals with Nucleophilic Reagents and Dimethyl Acetylenedicarboxylate. Molecules 2007, 12, 2061-2079.

Show more citation formats Show less citations formats

Related Articles

Article Metrics

Article Access Statistics

1

Comments

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