La(OTf)3 catalyzed reaction of salicylaldehyde phenylhydrazones with β-ketoesters and activated alkynes: facile approach for the preparation of chromenopyrazolones
Author:
Affiliation:
1. Natural Products Chemistry Division
2. CSIR-Indian Institute of Chemical Technology
3. Hyderabad-500 007
4. India
5. AcSIR-Indian Institute of Chemical Technology
Abstract
A facile approach has been developed for the preparation of chromenopyrazolones (5a–o, 7a–k) by the reaction of salicylaldehyde phenylhydrazones (3a–o) with β-ketoesters (4a, 4f–g) and activated alkynes (6a–e) in the presence of La(OTf)3 with good yields.
Funder
Science and Engineering Research Board
Department of Science and Technology, Ministry of Science and Technology
Publisher
Royal Society of Chemistry (RSC)
Subject
General Chemical Engineering,General Chemistry
Link
http://pubs.rsc.org/en/content/articlepdf/2016/RA/C6RA21717F
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