1
|
Gowda D, Harsha KB, Shalini VG, Rangappa S, Rangappa KS. Microwave assisted one-pot access to pyrazolo quinolinone and tetrahydroisoxazolo quinolinone derivatives via T3P®-DMSO catalysed tandem oxidative-condensation reaction. RSC Adv 2023; 13:28362-28370. [PMID: 37795377 PMCID: PMC10545979 DOI: 10.1039/d3ra05235d] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/02/2023] [Accepted: 09/18/2023] [Indexed: 10/06/2023] Open
Abstract
A new approach for the synthesis of two important annulated pyrazolo quinolinone and tetrahydroisoxazolo quinolinone derivatives from multicomponent reactions was achieved by using T3P®-DMSO-catalysed reactions of stable alcohols, cyclic 1,3-dicarbonyl compounds and amino derivatives of phenyl pyrazoles and isoxazole and has been reported for the first time. This reaction occurred via a tandem oxidative-condensation reaction under microwave irradiation and notable characteristics of this protocol are MCR reactions, shorter reaction time, less waste creation, ease of workup, stable precursors, broad substrate scope and functional group tolerance.
Collapse
Affiliation(s)
- Darshini Gowda
- DOS in Chemistry, University of Mysore Mysuru-57006 India
| | - Kachigere B Harsha
- Department of Chemistry, School of Engineering, University of Mysore Mysuru-570006 India
| | | | - Shobith Rangappa
- Adichunchanagiri Institute for Molecular Medicine Nagamangala-571448 India
| | | |
Collapse
|
2
|
Halligudra G, Paramesh CC, Mudike R, Ningegowda M, Rangappa D, Shivaramu PD. Pd II on Guanidine-Functionalized Fe 3O 4 Nanoparticles as an Efficient Heterogeneous Catalyst for Suzuki-Miyaura Cross-Coupling and Reduction of Nitroarenes in Aqueous Media. ACS OMEGA 2021; 6:34416-34428. [PMID: 34963927 PMCID: PMC8697406 DOI: 10.1021/acsomega.1c04528] [Citation(s) in RCA: 7] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/19/2021] [Accepted: 11/26/2021] [Indexed: 05/27/2023]
Abstract
This paper presents guanidine-functionalized Fe3O4 magnetic nanoparticle-supported palladium (II) (Fe3O4@Guanidine-Pd) as an effective catalyst for Suzuki-Miyaura cross-coupling of aryl halides using phenylboronic acids and also for selective reduction of nitroarenes to their corresponding amines. Fe3O4@Guanidine-Pd synthesized is well characterized using FT-IR spectroscopy, XRD, SEM, TEM, EDX, thermal gravimetric analysis, XPS, inductively coupled plasma-optical emission spectroscopy, and vibrating sample magnetometry analysis. The prepared Fe3O4@Guanidine-Pd showed effective catalytic performance in the Suzuki-Miyaura coupling reactions by converting aryl halides to their corresponding biaryl derivatives in an aqueous environment in a shorter reaction time and with a meagerly small amount of catalyst (0.22 mol %). Also, the prepared Fe3O4@Guanidine-Pd effectively reduced nitroarenes to their corresponding amino derivatives in aqueous media at room temperature with a high turnover number and turnover frequency with the least amount of catalyst (0.13 mol %). The most prominent feature of Fe3O4@Guanidine-Pd as a catalyst is the ease of separation of the catalyst from the reaction mixture after the reaction with the help of an external magnet with good recovery yield and also reuse of the recovered catalyst for a few cycles without significant loss in its catalytic activity.
Collapse
Affiliation(s)
- Guddappa Halligudra
- Department
of Applied Sciences, Center for Postgraduate Studies, Visvesvaraya Technological University, Bengaluru Region, Muddenahalli, Chikkaballapur District 562 101, India
| | - Chitrabanu C. Paramesh
- Department
of Applied Sciences, Center for Postgraduate Studies, Visvesvaraya Technological University, Bengaluru Region, Muddenahalli, Chikkaballapur District 562 101, India
| | - Ravi Mudike
- Department
of Applied Sciences, Center for Postgraduate Studies, Visvesvaraya Technological University, Bengaluru Region, Muddenahalli, Chikkaballapur District 562 101, India
- Solar
Resource Assessment Division, National Institute
of Solar Energy, Gwal Pahari, Gurugram 122 003, Haryana, India
| | - Mallesha Ningegowda
- SRI
RAM CHEM, R & D Centre, Plot No. 31, JCK Industrial Park, Belagola Industrial Area, Mysore 570016, India
| | - Dinesh Rangappa
- Department
of Applied Sciences, Center for Postgraduate Studies, Visvesvaraya Technological University, Bengaluru Region, Muddenahalli, Chikkaballapur District 562 101, India
| | - Prasanna D. Shivaramu
- Department
of Applied Sciences, Center for Postgraduate Studies, Visvesvaraya Technological University, Bengaluru Region, Muddenahalli, Chikkaballapur District 562 101, India
| |
Collapse
|