Design and synthesis of benzylpyrazolyl coumarin derivatives via a four-component reaction in water: investigation of the weak interactions accumulating in the crystal structure of a signified compound
作者:Partha Pratim Ghosh、Gargi Pal、Sanjay Paul、Asish R. Das
DOI:10.1039/c2gc36021g
日期:——
benzylpyrazolyl coumarinderivatives have been synthesized by a green one-pot four-component reaction between aryl hydrazine/hydrazine hydrate (1), ethyl acetoacetate (2), aromatic aldehydes (3) and 4-hydroxycoumarin (4). Molecular scaffolds which assimilate bio-active 3-benzylsubstituted 4-hydroxycoumarins as well as a pyrazolone ring in a single nucleus may be worthwhile molecules from a biological
A Facile Solvent-Free Route for One-Pot Multicomponent Synthesis of Benzylpyrazolyl Coumarins Derivatives in Presence of Effective Synergetic Catalytic System
作者:NARENDRA R. KAMBLE、VINOD T. KAMBLE
DOI:10.14233/ajchem.2019.21986
日期:2019.5.25
A combinatorial library of benzylpyrazolyl coumarin derivatives have been synthesized by a green one-pot four-component reaction between aryl hydrazine/hydrazine hydrate (1), ethyl acetoacetate (2), aromatic aldehydes (3) and 4-hydroxycoumarin (4) catalyzed by niobium pentachloride with silversalt under solvent-free conditions has been developed. Experimental simplicity, simple work-up procedure and
A facile one-pot, four-component synthesis of biologically important benzylpyrazolyl coumarins in water has been demonstrated using environmentally benign Ca(II) as the catalyst. Participation of aliphatic aldehydes has been described for the first time. Short reaction times, high yields and chromatography free isolation of the products, usage of eco-friendly catalyst and solvent are the key features of this method. (C) 2015 Elsevier Ltd. All rights reserved.
Metal-free heterogeneous and mesoporous biogenic graphene-oxide nanoparticle-catalyzed synthesis of bioactive benzylpyrazolyl coumarin derivatives
作者:T. A. J. Siddiqui、Balaji G. Ghule、Shoyebmohamad Shaikh、Pritamkumar V. Shinde、Krishna Chaitanya Gunturu、P. K. Zubaidha、Je Moon Yun、Colm O'Dwyer、Rajaram S. Mane、Kwang Ho Kim
DOI:10.1039/c7ra12550j
日期:——
(GONPs), a metal-free, heterogeneous, non-toxic, reusable and mesoporous green-(acid)-catalyst obtained by sugar carbonization through a micro-wave chemical synthesis method for the synthesis of bio-active benzylpyrazolyl coumarin derivatives (BCDs) under thermal conditions (50 °C) in ethanol solvent. The obtained products were purified by re-crystallization from ethanol, assuring usability of GONPs