85459-97-8Relevant academic research and scientific papers
One-pot synthesis of 2-amino-3-cyano-4H-pyrans and pyran-annulated heterocycles using sodium citrate as an organo-salt based catalyst in aqueous ethanol
Thongni, Aiborlang,Phanrang, Pynskhemborlang T.,Dutta, Arup,Nongkhlaw, Rishanlang
supporting information, p. 43 - 62 (2021/11/09)
Sodium citrate as a highly efficient catalyst is developed for the synthesis of functionalized 2-amino-3-cyano-4H-pyrans and pyran-annulated heterocycles. This method involves a one-pot three-component reaction of aromatic aldehydes, malononitrile and 1,3
Sugarcane Bagasse Ash-Based Silica-Supported Boric Acid (SBA-SiO2-H3BO3): A Versatile and Reusable Catalyst for the Synthesis of 1,4Dihydropyrano[2,3c]pyrazole Derivatives
Kumar, A.,Pandey, A. K.,Shrivastava, S. C.
, p. 653 - 660 (2021/06/02)
Abstract: A simple, green, and efficient protocol has been developed for the synthesis of biologically active 1,4dihydropyrano[2,3c]pyrazole derivatives via one-pot four-component reaction of various substituted benzaldehydes, hydrazine hydrate or phenylh
Concentrated solar radiation-assisted one-pot/multicomponent synthesis of pyranopyrazole derivatives under neat condition
Gadkari, Yatin U.,Hatvate, Navnath T.,Telvekar, Vikas N.
, p. 4245 - 4255 (2021/07/17)
Concentrated solar radiation (CSR)-assisted synthesis of pyranopyrazole derivatives under solvent and catalyst-free condition has been reported in the present protocol. One-pot multicomponent synthesis from aromatic/heteroaldehyde, ethyl acetoacetate, malononitrile, and hydrazine hydrate leads to the final desired compounds in a good yield. This operationally simple methodology has several advantages such as green and clean reaction profile, simple workup and purification procedures, extremely short reaction time, atom efficiency, and being economical. The current energy-efficient method saves almost 98% of energy as compared to the conventional method. Graphical abstract: [Figure not available: see fulltext.]
Green synthesis of pyrazolopyranopyrimidinone and pyranopyrazole derivatives using porphyrin-initiated amine-functionalized PolyBCMO dendritic polymer as sonocatalyst
Avudaiappan, Govindan,Unnimaya T., Jayaprakash,Asha, Pallikkattil,Unnikrishnan, Vettukattil,Sreekumar, Krishnapillai
, p. 197 - 209 (2019/12/24)
A novel porphyrin-initiated amine-functionalized poly-3,3-bis(chloromethyl)oxetane (PBCMO-amine) dendritic polymer was effectively synthesized. Characterization using the UV-vis, IR, NMR, PXRD, TG, and FE-SEM spectroscopy and microscopy enabled one to ass
Catalyst-free green synthesis of dihydropyrano[2,3-c]pyrazole scaffolds assisted by ethylene glycol (E-G) as a reusable and biodegradable solvent medium
Mohamadpour, Farzaneh
, (2020/06/10)
Abstract: We revealed a catalyst-free, green and rapid one-pot four-component tandem strategy for the preparation of dihydropyrano[2,3-c]pyrazoles – a biologically significant scaffold – via Knoevenagel-Michael cyclocondensation based on green chemistry p
An expedient and eco-friendly approach for multicomponent synthesis of dihydropyrano[2,3-c]pyrazoles using nano-Al2O3/BF3/Fe3O4 as reusable catalyst
Babaei, Elaheh,Mirjalili, Bi Bi Fatemeh
, p. 16 - 21 (2019/11/14)
The pyranopyrazole derivatives have many biological activities. They were synthesized via a four-component coupling of aromatic aldehyde, malononitrile, ethyl acetoacetate and hydrazine hydrate. In this study, dihydropyrano[2,3-c]pyrazoles have been synth
Core-shell structured magnetic silica supported propylamine/molybdate complexes: An efficient and magnetically recoverable nanocatalyst
Neysi, Maryam,Zarnegaryan, Ali,Elhamifar, Dawood
, p. 12283 - 12291 (2019/08/12)
In the present study, a novel core-shell structured magnetic silica supported propylamine/molybdate complex (Fe3O4@SiO2/Pr-NMo[Mo5O18]) is prepared, characterized and applied as an effective and easil
An Eco-friendly Catalytic System for One-pot Multicomponent Synthesis of Diverse and Densely Functionalized Pyranopyrazole and Benzochromene Derivatives
Patil,Patil, Rupesh C.,Patil, Suresh S.
, (2019/06/24)
An external base-free, efficient, cost-effective, and environmentally benign protocol has been developed for the one-pot multicomponent synthesis of highly functionalized pyranopyrazoles and benzochromenes using water extract of Agave americana (century p
A convenient route toward one-pot multicomponent synthesis of spirochromenes and pyranopyrazoles accelerated via quinolinic acid
Oudi, Maryam,Sanchooli Tazeh, Kazem,Hazeri, Nourallah,Fatahpour, Maryam,Ahmadi, Raheleh
, p. 1721 - 1728 (2019/06/08)
In the present work, the catalytic activity of quinolinic acid (QUIN) was studied for the synthesis of spirochromene and pyranopyrazole derivatives from readily available materials. The salient features of these one-pot multicomponent protocols are the clean reaction profile, easy isolation of products, no chromatographic separation techniques, high efficiency, short reaction time, and high yield of products plus using QUIN as a new, inexpensive, commercially available, and efficient organocatalyst.
