Four component synthesis of highly functionalized pyrano[2,3-<i>c</i>]pyrazoles from benzyl halides
作者:Mallappa Beerappa、Kalegowda Shivashankar
DOI:10.1080/00397911.2017.1386788
日期:2018.1.17
oxidized four component reaction for the preparation of pyranopyrazole with different substituted pattern have been developed which provides rapid access to a library of compounds in good to excellent yields by using benzyl halide, malanonitrile/ethyl cyanoacetate, diethylacetylenedicarboxylate/ethyl acetoacetate and hydrazinehydrate as reactants. This transformationinvolves the breaking of one C‒O
CeO2/ZrO2 as green catalyst for one-pot synthesis of new pyrano[2,3-c]-pyrazoles
作者:Surya Narayana Maddila、Suresh Maddila、Werner E. van Zyl、Sreekantha B. Jonnalagadda
DOI:10.1007/s11164-017-2878-7
日期:2017.8
via four-component reaction of malononitrile, hydrazine hydrate, ethyl acetoacetate, and substituted aldehydes is described. The catalytic material CeO2/ZrO2 was prepared and characterized by different techniques including powder X-ray diffraction (P-XRD), scanning electron microscopy (SEM), transmission electron microscopy (TEM), and Brunauer–Emmett–Teller (BET) analysis. Twelve new pyrano[2,3-c]-pyrazole
Rapid One-pot, Four Component Synthesis of Pyranopyrazoles Using Heteropolyacid Under Solvent-free Condition
作者:Hemant V. Chavan、Santosh B. Babar、Rahul U. Hoval、Babasaheb P. Bandgar
DOI:10.5012/bkcs.2011.32.11.3963
日期:2011.11.20
A series of pyranopyrazoles, was efficiently synthesized via one-pot, four component reaction of ethyl acetoacetate, hydrazine hydrate, aldehydes and malononitrile in the presence of catalytic amount silicotungstic acid under solvent free condition. NOE experiments confirmed that the product exist exclusively in the 2H form. The present protocol offers the advantages of clean reaction, short reaction time, high yield, easy purification and economic availability of the catalyst.
Synthesis and Evaluation of Some New 4H-Pyran Derivatives as Antioxidant, Antibacterial and Anti-HCT-116 Cells of CRC, with Molecular Docking, Antiproliferative, Apoptotic and ADME Investigations
作者:Nahed N. E. El-Sayed、Magdi E. A. Zaki、Sami A. Al-Hussain、Abir Ben Bacha、Malika Berredjem、Vijay H. Masand、Zainab M. Almarhoon、Hanaa S. Omar
DOI:10.3390/ph15070891
日期:——
CDK2. The 4H-pyran scaffold is considered an antitumoral, antibacterial and antioxidant lead as well as a CDK2 inhibitor. Herein, certain 4H-pyran derivatives were evaluated as antibacterial, antioxidant and cytotoxic agents against HCT-116 cells. Derivatives 4g and 4j inhibited all the tested Gram-positive isolates, except for B. cereus (ATCC 14579), with lower IC50 values (µM) than ampicillin. In addition
[EN] POLYCYCLIC DERIVATIVES TARGETING RAL GTPASES AND THEIR THERAPEUTICAL APPLICATIONS<br/>[FR] DÉRIVÉS POLYCYCLIQUES CIBLANT DES GTPASES RAL ET LEURS APPLICATIONS THÉRAPEUTIQUES