NISCAIR Online Periodicals Repository

Research Journals >
Indian Journal of Chemistry -Section B (IJC-B) >
IJC-B Vol.49B [2010] >
IJC-B Vol.49B(04) [April 2010] >

Title: Synthesis and study of chlorosubstituted 4-aroyl and 4-alkoyl-pyrazolines, pyrazoles and their effect on some flowering plants
Authors: Mahale, Jaishree D
Manoja, S C
Belsare, N G
Rajput, P R
Keywords: Valeric acid
Issue Date: Apr-2010
Publisher: CSIR
Abstract: Some new chlorosubstituted 4-aroyl/alkoylpyrazolines 5a,b and 4-aroyl/alkoylpyrazoles 7a,b have been synthesized by condensation of 1-(2′-hydroxy-3′-5′-dichlorophenyl)-3-aryl/alkyl-1-3-propanedione 3a,b and valeraldehyde by Baker-Venkatraman transformation of corresponding aroyl/alkoyloxyacetophenones. Aroyl/Alkoyloxyacetophenones 2a,b undergo intramolecular Claisen condensation to form 1-(2′-hydroxy-3′-5′-dichloro­phenyl)-3-aryl/alkyl-1,3-propanediones 3a,b which on treatment with aliphatic aldehyde in ethanol containing little piperidine forms 3-aroyl/alkoylchromanones 4a,b. From these 3-aroyl/alkoylchromanones 4a,b 4-aroyl/alkoylpyrazolines 5a,b are synthesized. 3-Aroyl/Alkoylchromanones 4a,b are converted into 3-aroyl/alkoylchromones 6a,b. The 3-aroyl/alkoylchromones 6a,b on treatment with Ph.NHNH2.HCl in dioxane containing small amount of piperidine furnish 4-aroyl/alkoylpyrazoles 7a,b. The structures of the newly synthesized chlorosubstituted 4-aroyl /alkoylpyrazolines 5a,b and 4-aroyl/alkoylpyrazoles 7a,b have been elucidated on the basis of spectral analysis and their homogeneity has been established by TLC.
Page(s): 505-511
Source:IJC-B Vol.49B(04) [April 2010]

Files in This Item:

File Description SizeFormat
IJCB 49B(4) 505-511.pdf174.32 kBAdobe PDFView/Open
 Current Page Visits: 943 
Recommend this item


Online Submission of Articles |  NISCAIR Website |  National Knowledge Resources Consortium |  Contact us |  Feedback

Disclaimer: NISCAIR assumes no responsibility for the statements and opinions advanced by contributors. The editorial staff in its work of examining papers received for publication is helped, in an honorary capacity, by many distinguished engineers and scientists.

CC License Except where otherwise noted, the Articles on this site are licensed under Creative Commons License: CC Attribution-Noncommercial-No Derivative Works 2.5 India

Copyright © 2015 The Council of Scientific and Industrial Research, New Delhi. All rights reserved.

Powered by DSpace Copyright © 2002-2007 MIT and Hewlett-Packard | Compliant to OAI-PMH V 2.0

Home Page Total Visits: 135868 since 01-Sep-2015  Last updated on 27-May-2016Webmaster: