61348-47-8Relevant articles and documents
CuI/Cu(OSO2CF3)2 catalysed convenient approach to dichromenopyridines and triazole-thiazole appended chromone derivatives
Yerrabelly, Jayaprakash Rao,Porala, Subbanarasimhulu,Kasireddy, Venkateshwar Reddy,Ghojala, Venkat Reddy,Rebelli, Pradeep
, p. 3781 - 3790 (2021/11/01)
A variety of new pentacyclic dichromenopyridines have been synthesized from 2-amino chromone and O-propargyloxy salicilaldehydes through intramolecular Povarov reaction using CuI/Cu(OSO2CF3)2 as a Lewis acid catalyst. The
Synthesis, antimicrobial and antiproliferative activities, molecular docking, and computational studies of novel heterocycles
Fahim, Asmaa M.,Tolan, Hala E. M.,Awad, Hanem,Ismael, Eman H. I.
, p. 2965 - 2981 (2021/05/11)
We studied the reaction of enaminone 3 with some nitrogen nucleophiles to afford the corresponding pyrazole 4, isoxazole 5, and pyrimidine 6 derivatives, and the reactivity of enaminone 3 with heterocyclic amines to afford the corresponding fused pyrrolo[
Zn(OTf)2-Catalyzed Formal [3 + 3] Cascade Annulation of Propargylic Alcohols with 2-Aminochromones: Accessing the Chromeno[2,3- b]pyridines
Tong, Pei,Sun, Zhou,Wang, Shutao,Zhang, Yuan,Li, Ying
, p. 13967 - 13974 (2019/10/16)
A Zn(OTf)2-catalyzed formal [3 + 3] cascade annulation strategy for the synthesis of functionalized chromeno[2,3-b]pyridines has been developed using propargylic alcohols and 2-aminochromones as the substrates. The protocol provides a convenien
Chromenone-rhodamine conjugate for naked eye detection of Al3+ and Hg2+ ions in semi aqueous medium
Mondal, Subhendu,Bandyopadhyay, Chandrakanta,Ghosh, Kumaresh
, p. 1 - 8 (2018/10/15)
Chromenone-rhodamine conjugate 1 has been synthesized and its metal ion binding properties have been studied in CH3CN/water (3:1, v/v; 10?mM HEPES buffer; pH?=?6.85). Compound 1 senses multiple metal ions such as Al3+ and Hg2+/
Synthesis of unsymmetrical 4-oxo-2-vinyl-4H-chromene-3-carbonitrile dyes via Knoevenagel reaction
Levchenko,Chudov,Zinoviev,Lyssenko,Demin,Poroshin,Shmelin,Grebennikov
, p. 2788 - 2792 (2018/06/08)
New 4-oxo-2-vinyl-4H-chromene-3-carbonitrile derivatives have been synthesized by the Knoevenagel reaction of 2-methyl-4-oxo-4H-chromene-3-carbonitrile with aromatic and heteroaromatic aldehydes. Spectral properties of the obtained compounds have been studied.
A Convenient and Practical Synthesis of Aminopyrazoles
Mitchell, David,Luo, Yumei,Mcnulty, Lu Anne M.,Buser, Jonas Y.,Mcfarland, Adam D.
, p. 235 - 241 (2015/05/05)
A selective methodology for preparing highly substituted aminopyrazoles has been demonstrated. Starting with an acetophenol core, the corresponding substituted isoxazole is prepared in two steps. The isoxazole is transformed into a benzopyran. Alkylation
Synthesis of new hybrid heterocyclic compounds having 1,2,3-triazole and isoxazole via click chemistry
Jayaprakash Rao,Srinivas
, p. 1675 - 1678 (2015/01/09)
A simple and highly efficient method for the regioselective synthesis of isoxazolyl-1,4-disubstituted-1,2,3-triazoles 6a-l in good to excellent yields from terminal alkynes having isoxazole scaffold 4a-c and various azides through Cu(I)-catalyzed 1,3-dipolar cycloaddition is described. The reaction proceeds smoothly in 1:1 mixture of t-BuOH and water at RT. The structures of all newly synthesized hybrid heterocycles are established on the basis of spectral data ir, 1H nmr, mass, and elemental analysis.
Facile syntheses of 2-substituted 3-cyanochromones
Levchenko,Semenova,Yarovenko,Shmelin,Krayushkin
scheme or table, p. 3630 - 3632 (2012/09/22)
A simple and general route to 3-cyanochromones containing various substituents on position 2 of the ring is developed. The method is based on condensation of 3-(2-hydroxyphenyl)-3-oxopropionitrile with acid chlorides or anhydrides in pyridine at room temp
Synthesis of 2,2′-diaminobischromones using a modified procedure for the rearrangement of 5-(2-hydroxyphenyl)isoxazole to 2-aminochromone
Ghosh, Tarun,Saha, Satyajit,Bandyopadhyay, Chandrakanta
, p. 1845 - 1849 (2007/10/03)
A modified procedure for the rearrangement of 5-(2-hydroxyphenyl)isoxazoles 6a-e to 2-aminochromones 8a-e was developed and this procedure was utilised in the synthesis of hitherto unreported bischromones 3a-c. The isoxazoles 6a-e were prepared regioselec
A rapid and facile synthesis of isoxazolyl and pyrazolyl phenols from enaminoketones using montmorillonite under heterogeneous catalytic conditions
Jagath Reddy,Srinivasa Rao,Khalilullah,Latha
, p. 1295 - 1297 (2007/10/03)
A number of isoxazolyl and pyrazolyl phenols (4a-f and 5a-d) have been synthesized from 1-(2-hydroxyaryl)-3-dimethylamino-2-propen-1-ones 3a-f using montmorillonite as solid acid support.