Palladium Loaded Dendronized Polymer as Efficient Polymeric Sustainable Catalyst for Heck Coupling Reaction

Hiba, K.; Krishna, Gopal; Prathapan, Sreedharan; Sreekumar, K.

doi:10.1007/s10562-021-03767-6

Cited by 2 publications

(1 citation statement)

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“…Based on earlier reports, [62–64] Scheme 5 depicts the proposed mechanism for the synthesis of polyhydroquinolines by Hantzsch condensation of aromatic aldehyde, ethyl acetoacetate, dimedone, and ammonium acetate in the presence of the catalyst PHG−G0. Two mechanistic pathways are proposed for the formation of polyhydroquinolines.…”

Section: Resultsmentioning

confidence: 99%

Synthesis of Quinoline and Polyhydroquinoline Derivatives Using Phloroglucinol Cored Amino Functionalized Dendritic Polymer as Catalyst

et al. 2022

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Phloroglucinol cored primary amine-functionalized G0 dendritic polymer (PHGÀ G0) was effectively synthesized. The polymer was characterized by different spectroscopic and analytical techniques including Fourier transform infrared (FT-IR) and Nuclear magnetic resonance (NMR) spectra, Thermogravimetric Analysis (TG-DTG) and Gel Permeation Chromatography (GPC). The catalytic efficiency of the PHGÀ G0 was evaluated in the three-component one-pot green synthesis of quinoline and four component synthesis of polyhydroquinoline derivatives. Quinoline derivatives were obtained 92 % of yield within 60 minutes in water/ethanol (1 : 1) (v/v) mixture as solvent and polyhydroquinoline derivatives were obtained 90 % of yield within 30 minutes in acetonitrile as solvent under reflux conditions. High amino group capacity and high thermal stability made the PHGÀ G0 dendritic polymer a good base catalyst. All the quinoline and polyhydroquinoline derivatives were characterized by determining the melting point, Fourier transform infrared (FT-IR) and Nuclear magnetic resonance (NMR) spectra. The present method is green, efficient, and costeffective. Catalyst can be reused up to four reaction cycles without any characteristic loss of its activity.

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Section: Resultsmentioning

confidence: 99%