CuO nanoparticles: synthesis and application as an efficient reusable catalyst for the preparation of xanthene substituted 1,2,3-triazoles via click chemistry
摘要:
Copper(II) oxide (CuO) nanoparticles have been found to be an efficient catalyst for 1,3-dipolar cycloaddition (CuAAC) of aromatic azides and acetylenic xanthenes furnishing the corresponding xanthene substituted triazoles in excellent yields. CuO nanoparticles have been synthesized from copper acetate by simple co-precipitation method and characterized by scanning electron microscope, energy dispersive X-ray analysis, transmission electron microscope, and X-ray diffraction analysis. The salient features of the present protocol are mild reaction conditions, shorter reaction time, reusability of the catalyst, and applicability to a wide range of substrates. (C) 2015 Elsevier Ltd. All rights reserved.
[EN] XANTHENEDIONE DERIVATIVES FOR THE TREATMENT OF PIGMENTATION AND SKIN AGEING DISORDERS<br/>[FR] DÉRIVÉS DE XANTHÈNEDIONE POUR LE TRAITEMENT DE TROUBLES DE PIGMENTATION ET DE VIEILLISSEMENT DE LA PEAU
申请人:FABRE PIERRE DERMO COSMETIQUE
公开号:WO2012004390A1
公开(公告)日:2012-01-12
The invention relates to compound of generic formula (I) in which: R1 and R2 represent: OH, a hydrogen atom, a C1-C6 alkyl radical a C1-C6 alkoxy radical, a halogen, or OCOR3; R3 represents: a C1-C24 alkyl radical a C12-C24 alkenyl radical comprising at least one unsaturation; R4 represents: COR5, a glucide substituted or not by one or more acetyl radical(s); R5 represents: a C10-C24 alkyl radical or a C12-C24 alkenyl radical comprising at least one unsaturation; R6 and R7 represent: - simultaneously a hydrogen atom or a methyl radical, or - when R6 represents a hydrogen atom, R7 represents a C1-C6 alkyl radical or a phenyl substituted or not by one or more C1-C3 alkoxy radical(s) or one or more halogen(s) or - R6 and R7 are bonded together and form a C3-C6 cycloalkyl, and pharmaceutically or cosmetically acceptable salts.
Evaluation of xanthene-appended quinoline hybrids as potential leads against antimalarial drug targets
作者:R. Jesu Jaya Sudan、J. Lesitha Jeeva Kumari、P. Iniyavan、S. Sarveswari、V. Vijayakumar
DOI:10.1007/s11030-022-10450-4
日期:——
performed to find the binding efficacy of all these newly synthesized compounds towards thirteen antimalarialdrug targets. Molecular dynamics simulation was carried out to predict the stability of the ligand-bound complex in a solvent medium. Blind and site-directed docking with compounds 6a–n against 13 drug targets revealed most of the ligands to have a good binding affinity with the targets. Analysis
A greener synthesis of 1,8-dioxo-octahydroxanthene derivatives under ultrasound
作者:Naveen Mulakayala、G. Pavan Kumar、D. Rambabu、Madhu Aeluri、M.V. Basaveswara Rao、Manojit Pal
DOI:10.1016/j.tetlet.2012.10.024
日期:2012.12
The ceric ammonium nitrate (CAN) has been identified as an efficient and eco-friendly catalyst for the one pot and virtually three-component reaction of 5,5-dimethyl-1,3-cyclohexanedione with various aldehydes in 2-propanol. Under ultrasound irradiation, the reaction proceeded smoothly at a faster rate at 50 degrees C affording a variety of 9-alkyl/aryl/heteroaryl substituted 3,3,6,6-tetramethyl-3,4,5,6,7,9-hexahydro-1H-xanthene-1,8(2H)-diones in good to excellent yields. A probable mechanism for this CAN-mediated synthesis of 1,8-dioxo-octahydroxanthene derivatives is presented. Overall, the methodology provides advantages such as low cost, high yields of products and simple operational procedures and is free from the use of harmful chlorinated solvents. (C) 2012 Elsevier Ltd. All rights reserved.
Green approach for the synthesis of xanthenedione derivatives: crystal structure, DFT, and Hirshfeld surface analysis
XANTHENEDIONE DERIVATIVES FOR THE TREATMENT OF PIGMENTATION AND SKIN AGEING DISORDERS
申请人:Poigny Stéphane
公开号:US20130108568A1
公开(公告)日:2013-05-02
The invention relates to compound of generic formula (I) in which: R
1
and R
2
represent: OH, a hydrogen atom, a C
1
-C
6
alkyl radical a C
1
-C
6
alkoxy radical, a halogen, or OCOR
3
; R
3
represents: a C
1
-C
24
alkyl radical a C
12
-C
24
alkenyl radical comprising at least one unsaturation; R
4
represents: COR
5
, a glucide substituted or not by one or more acetyl radical(s); R
5
represents: a C
10
-C
24
alkyl radical or a C
12
-C
24
alkenyl radical comprising at least one unsaturation; R
6
and R
7
represent:—simultaneously a hydrogen atom or a methyl radical, or—when R
6
represents a hydrogen atom, R
7
represents a C
1
-C
6
alkyl radical or a phenyl substituted or not by one or more C
1
-C
3
alkoxy radical(s) or one or more halogen(s) or—R
6
and R
7
are bonded together and form a C
3
-C
6
cycloalkyl, and pharmaceutically or cosmetically acceptable salts.