- NOVEL COMPOUNDS FOR SKIN LIGHTENING
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Novel compounds are disclosed. Skin lightening composition comprising said compounds and method of skin lightening is disclosed too. In addition, method of synthesizing said novel compounds are disclosed.
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Page/Page column 13
(2021/03/05)
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- NOVEL COMPOUNDS FOR SKIN LIGHTENING
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A novel compound is disclosed. Skin lightening composition comprising said compound and method of skin lightening is disclosed too. In addition, method of synthesizing said novel compound is disclosed.
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Page/Page column 11; 12
(2021/03/05)
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- Soluble/MOF-Supported Palladium Single Atoms Catalyze the Ligand-, Additive-, and Solvent-Free Aerobic Oxidation of Benzyl Alcohols to Benzoic Acids
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Metal single-atom catalysts (SACs) promise great rewards in terms of metal atom efficiency. However, the requirement of particular conditions and supports for their synthesis, together with the need of solvents and additives for catalytic implementation, often precludes their use under industrially viable conditions. Here, we show that palladium single atoms are spontaneously formed after dissolving tiny amounts of palladium salts in neat benzyl alcohols, to catalyze their direct aerobic oxidation to benzoic acids without ligands, additives, or solvents. With this result in hand, the gram-scale preparation and stabilization of Pd SACs within the functional channels of a novel methyl-cysteine-based metal-organic framework (MOF) was accomplished, to give a robust and crystalline solid catalyst fully characterized with the help of single-crystal X-ray diffraction (SCXRD). These results illustrate the advantages of metal speciation in ligand-free homogeneous organic reactions and the translation into solid catalysts for potential industrial implementation.
- Tiburcio, Estefanía,Greco, Rossella,Mon, Marta,Ballesteros-Soberanas, Jordi,Ferrando-Soria, Jesús,López-Haro, Miguel,Hernández-Garrido, Juan Carlos,Oliver-Meseguer, Judit,Marini, Carlo,Boronat, Mercedes,Armentano, Donatella,Leyva-Pérez, Antonio,Pardo, Emilio
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p. 2581 - 2592
(2021/02/16)
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- Fluorine-Directed Glycosylation Enables the Stereocontrolled Synthesis of Selective SGLT2 Inhibitors for Type II Diabetes
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Inhibition of the sodium-glucose co-transporters (SGLT1 and SGLT2) is a validated strategy to address the increasing prevalence of type II diabetes mellitus. However, achieving selective inhibition of human SGLT1 or SGLT2 remains challenging. Orally available small molecule drugs based on the d-glucose core of the natural product Gliflozin have proven to be clinically effective in this regard, effectively impeding glucose reabsorption. Herein, we disclose the influence of molecular editing with fluorine at the C2 position of the pyranose ring of Phlorizin analogues Remogliflozin Etabonate and Dapagliflozin (Farxiga) to concurrently direct β-selective glycosylation, as is required for biological efficacy, and enhance aspects of the physicochemical profile. Given the abundance of glycosylated pharmaceuticals in diabetes therapy that contain a β-configured d-glucose nucleus, it is envisaged that this strategy may prove to be expansive.
- Sadurní, Anna,Kehr, Gerald,Ahlqvist, Marie,Wernevik, Johan,Sj?gren, Helena Peilot,Kankkonen, Cecilia,Knerr, Laurent,Gilmour, Ryan
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supporting information
p. 2832 - 2836
(2017/12/26)
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- Syntheses and characterization of aryl-substituted pyrogallol[4]arenes and resorcin[4]arenes
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Seven aryl-substituted pyrogallol[4]arenes and six aryl-substituted resorcin[4]arenes were synthesized through the acid catalyzed reaction of either pyrogallol or resorcinol with a specific alkoxybenzaldehyde. Single crystal X-ray data was obtained for all thirteen compounds. In order to determine the effect of the different pendent -R groups, four properties were investigated: π-π distance, inward tilt, twist angle, and the angle between the planes containing the pendent -R groups. Positioning of the -R groups, the carbon atom chain length of the -R groups, the number of upper-rim hydroxyl groups (resorcin[4]arene vs. pyrogallol[4]arene), and the number of substituted phenyl groups all influenced these four properties. The trends that develop are investigated and discussed.
- Pfeiffer, Constance R.,Feaster, Kyle A.,Dalgarno, Scott J.,Atwood, Jerry L.
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p. 222 - 229
(2015/12/31)
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- Intermolecular C–O Coupling Using Hemicucurbituril Supported Ionic Liquid Phase Catalyst
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Abstract: Hemicucurbituril supported ionic liquid phase catalyst (HmCucSILP) has been synthesized by anchoring multilayer of ionic liquid ([Bmim]Cl) containing Pd(OAc)2 and X-phos on the surface of hemicucurbit[6]uril. The HmCucSILP was effectively employed in intermolecular C–O coupling of aryl halides with sodium alkoxides for the synthesis of alkyl aryl ethers. Graphical Abstract: [Figure not available: see fulltext.]
- Kurane, Rajanikant,Bansode, Prakash,Khanapure, Sharanabasappa,Kale, Dolly,Salunkhe, Rajashri,Rashinkar, Gajanan
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p. 2485 - 2494
(2016/11/25)
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- Pro-angiogenic effects of chalcone derivatives in zebrafish embryos in vivo
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The aim of this study was to investigate novel chalcones with potent angiogenic activities in vivo. Chalcone-based derivatives were evaluated using a transgenic zebrafish line with fluorescent vessels to real-time monitor the effect on angiogenesis. Results showed that the chalcone analogues did not possess anti-angiogenic effect on zebrafish vasculatures; instead, some of them displayed potent pro-angiogenic effects on the formation of the sub-intestinal vein. Similar pro-angiogenic effects can also be seen on wild type zebrafish embryos. Moreover, the expression of vegfa, the major regulator for angiogenesis, was also upregulated in their treatment. Taken together, we have synthesized and identified a series of novel chalcone-based derivatives as potent in vivo pro-angiogenic compounds. These novel compounds hold potential for therapeutic angiogenesis.
- Chen, Yau-Hung,Chang, Chao-Yuan,Chang, Chiung-Fang,Chen, Po-Chih,Lee, Ya-Ting,Chern, Ching-Yuh,Tsai, Jen-Ning
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p. 12512 - 12524
(2015/08/06)
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- Reactivity assessment of chalcones by a kinetic thiol assay
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The electrophilic nature of chalcones (1,3-diphenylprop-2-en-1-ones) and many other α,β-unsaturated carbonyl compounds is crucial for their biological activity, which is often based on thiol-mediated regulation processes. To better predict their biological activity a simple screening assay for the assessment of the second-order rate constants (k2) in thia-Michael additions was developed. Hence, a clear structure-activity relationship of 16 differentially decorated hydroxy-alkoxychalcones upon addition of cysteamine could be established. Moreover, amongst other naturally occurring α,β-unsaturated carbonyl compounds k2 values for curcumin and cinnamaldehyde were gained while cinnamic acids or esters gave no or very slow reactions.
- Amslinger, Sabine,Al-Rifai, Nafisah,Winter, Katrin,W?rmann, Kilian,Scholz, Rebekka,Baumeister, Paul,Wild, Martin
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supporting information
p. 549 - 554
(2013/03/13)
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- Facile synthesis of diarylmethanes via quinone methides
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A novel acid-mediated generation of quinone methides followed by nucleophilic addition of electronrich aromatic compounds to furnish diarylmethanes has been developed. A wide range of electronrich aromatic compounds including some heterocycles can be employed for this reaction to provide the corresponding diarylmethanes in good yields and regioselectivities.
- Tangdenpaisal, Kassrin,Phakhodee, Wong,Ruchirawat, Somsak,Ploypradith, Poonsakdi
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p. 933 - 941
(2013/07/25)
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- ANTIBACTERIAL AGENTS: ARYL MYXOPYRONIN DERIVATIVES
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The invention provides compounds of formula la, lb and Ic: [Formula Ia, Ib, and Ic] and salts thereof, wherein variables are as described in the specification, as well as compositions comprising a compound of formula Ia-Ic, methods of making such compounds, and methods of using such compounds, e.g., as inhibitors of bacterial RNA polymerase and as antibacterial agents.
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Page/Page column 72
(2014/01/09)
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- Stereospecific synthesis and biological evaluation of monodesmethyl metabolites of (+)-13a-(S)-deoxytylophorinine as potential antitumor agents
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Three major monodesmethyl metabolites of (+)-13a-(S)-deoxytylophorinine were synthesized stereospecifically and their configurations at C-13a were determined. Biological assays revealed that one of the metabolites, 3-O-desmethyl-13a-(S)-deoxytylophorinine
- Yu, Pengfei,Lv, Haining,Li, Chao,Ren, Jinhong,Ma, Shuanggang,Xu, Song,Chen, Xiaoguang,Yu, Shishan
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p. 3757 - 3764
(2013/02/23)
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- Cobaltoporphyrin-catalyzed CO2/epoxide copolymerization: Selectivity control by molecular design
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A series of cobalt(III) chloride porphyrin complexes of the general formula 5,10,15,20-tetra(p-alkoxy)phenylporphyrin cobalt chloride (4b-e) and the related 5,10,15,20-tetra(p-nitro)phenylporphyrin cobalt chloride (4f) are presented and their reactivity toward propylene oxide (PO)/CO2 coupling/copolymerization is explored. While the nitro-substituted complex (4f), in conjunction with an onium salt, shows moderate activity toward cyclization, the 4b-e/onium systems show superior copolymerization activity in comparison to tetraphenylporphyrin Co(III) chloride (4a) with high selectivity and conversion to poly(propylene carbonate) (PPC). A comprehensive copolymerization behavior study of the alkoxy-substituted porphyrin complexes 4b-e in terms of reaction temperature and CO2 pressure is presented. Complexes bearing longer alkoxy-substituents demonstrate the highest polymerization activity and molecular weights, however all substituted catalyst systems display a reduced tolerance to increased temperature with respect to PPC formation. Studies of the resulting polymer microstructures show excellent head-to-tail epoxide incorporation and near perfectly alternating poly(carbonate) character at lower polymerization temperatures.
- Anderson, Carly E.,Vagin, Sergei I.,Xia, Wei,Jin, Hanpeng,Rieger, Bernhard
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p. 6840 - 6849,10
(2020/08/24)
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- Limno-CP: A natural-product-inspired 5-aryl-3(2 H)-furanone as scaffold for a library of α-modified enones
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A library of 5-aryl-3(2H)-furanones that are modified in the α-position of the α,β-unsaturated carbonyl system was prepared via simple one- to three-step transformations from one common scaffold. The 13C NMR characterization of the enone system showed a strong influence of the α-substituents, especially on the shifts of the α- and β-carbon atoms. Probing the addition chemistry of nucleophiles versus our α-modified enones, a 1,2-addition-elimination- was found, but no 1,4-addition. Georg Thieme Verlag Stuttgart. New York.
- Amslinger, Sabine,Lindner, Simon K.
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scheme or table
p. 2671 - 2683
(2011/10/04)
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- Rational design and synthesis of 4-O-substituted phenylmethylenethiosemicarbazones as novel tyrosinase inhibitors
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In continuing our program aimed to search for tyrosinase inhibitors, a series of novel 4-O-substituted phenylmethylenethiosemicarbazones were rational designed, synthesized and their inhibitory effects on the diphenolase activity of mushroom tyrosinase were also evaluated. A fair number of compounds were found to have significant tyrosinase inhibitiory activity. Particularly, the IC50 values of compounds 3a-g, 3j and 3s were of the same magnitude as tropolone, one of the best tyrosinase inhibitors known so far. Furthermore, the structure-activity relationships of these compounds were also investigated. All these data suggested that these molecules might be utilized for the development of new candidate for the treatment of dermatological disorders, and further development of such compounds may be of interest.
- Yi, Wei,Cao, Rihui,Chen, Zhiyong,Yu, Liang,Wen, Huan,Yan, Qin,Ma, Lin,Song, Huacan
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scheme or table
p. 752 - 754
(2010/07/15)
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- Triton B-mediated efficient and convenient alkoxylation of activated aryl and heteroaryl halides
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A simple and convenient one-pot synthesis of aryl alkyl ethers by the alkoxylation of aryl halides with alcohol in the presence of Triton B as a base is described. The procedure is applicable for a variety of aryl and heteroaryl halides, and yields are very good. The use of a nonmetallic base and solvent-free conditions are important features of the reaction. Copyright Taylor & Francis Group, LLC.
- Meshram,Goud, P. Ramesh,Reddy, B. Chennakesava,Kumar, D. Aravind
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experimental part
p. 2122 - 2129
(2010/08/13)
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- Competitive formation of β-amino acids, propenoic, and ylidenemalonic acids by the Rodionov reaction from malonic acid, aldehydes, and ammonium acetate in alcoholic medium
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The Rodionov reaction of 49 available aliphatic and aromatic aldehydes with malonic acid and ammonium acetate in alcoholic medium, resulting in formation of β-amino acids, propenoic, and ylidenemalonic acids, was studied. Certain regioselectivity regularities of the reaction were revealed. Among the variety of ketones studied, cyclohexanone is the only whose reaction yields a β-amino acid. Unusual dehydrofluorination of 6-chloro-2-fluorocinnamic acid under the Rodionov reaction was discovered. 2005 Pleiades Publishing, Inc.
- Lebedev,Lebedeva,Sheludyakov,Kovaleva,Ustinova,Kozhevnikov
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p. 1113 - 1124
(2007/10/03)
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- A re-investigation of resveratrol synthesis by Perkins reaction. Application to the synthesis of aryl cinnamic acids
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A re-investigation of resveratrol synthesis by Perkins reaction allowed to improve this method and to determine the configuration of the intermediates. The results were applied to the synthesis of several aryl cinnamic acids for biological evaluation.
- Solladié, Guy,Pasturel-Jacopé, Yacine,Maignan, Jean
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p. 3315 - 3321
(2007/10/03)
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- Novel imidazole derivatives with anti-inflammatory activity
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Novel imidazole derivatives of formula I and their salts, solvates and prodrugs, wherein the meanings of the different radicals are as shown in the description. Said compounds are useful as anti-inflammatory agents.
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- Compositions containing aromatic aldehydes and their use in treatments
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Disclosed are pharmaceutical and cosmetic compositions containing aromatic aldehyde compounds. Some of the disclosed compositions are useful as topical therapeutics for treating inflammatory dermatologic conditions. Some of the compositions are useful in transdermal and other systemic dose forms for treating other inflammatory conditions in mammals.
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- Ukokinase inhibitors
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Compounds having the formula are inhibitors of urokinase and are useful in the treatment of diseases in which urokinase plays a role. Also disclosed are urokinase-inhibiting compositions and a method of inhibiting urokinase in a mammal.
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- Secondary amines
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Compounds of formula (II): STR1 or salt thereof; wherein R1 is hydrogen or methyl, R2 is hydrogen or methyl, R3 is hydrogen, C1-12 straight or branched alkyl, C3-10 cycloalkyl, phenyl(C1-4)-alkyl or benzyl optionally substituted by C1-4 alkyl, C1-4 alkoxy or halogen; R4 is hydrogen, halogen, hydroxy, C1-4 alkyl or C1-4 alkoxy, R5 is hydrogen or fluorine, R6 is hydrogen or fluorine, R7 is halogen; and n is 1 or 2, have anti-obesity and/or anti-hyperglycaemic activity.
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