- Palladium-Catalyzed Direct α-Arylation of Indane-1,3-dione to 2-Substituted Indene-1,3-diones
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A straightforward and feasible palladium-catalyzed direct α-arylation of indane-1,3-dione to 2-substituted aryl/heteroaryl indene-1,3-diones has been disclosed for the first time. Optimization of reaction conditions identified tBu-XPhos as a preferred ligand for the bis(acetonitrile)dichloropalladium(II) catalyst. A broad spectrum of aryl iodides and aryl triflates containing electron-donating, electron-withdrawing, and sterically hindered substituents gave an excellent yield for the quick access α-arylated 1,3-diones library.
- Hallur, Gurulingappa,Suresh, Palaniswamy,Tamizharasan, Natarajan
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p. 12318 - 12325
(2021/09/07)
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- Synthetic method of medical intermediate polycyclic diketone compound
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The invention relates to a synthetic method of a polycyclic diketone compound which can be used as a medical intermediate and is as shown in the formula (III). The synthetic method comprises the following step: in an organic solvent and in nitrogen atmosphere, a compound as shown in the formula (I) and a compound as shown in the formula (II) react in the presence of a catalyst, an oxidizing agent, alkali and a promoter, so as to obtain the compound as shown in the formula (III). In the formula (III), R is H, halogen, C1-C6 alkyl group or C1-C6 alkoxy group, and X is halogen. According to the method, a comprehensive reaction system of the catalyst, the oxidizing agent, alkali and the promoter is adopted, and the organic solvent is appropriately selected. Then, the target product with high yield can be obtained. Requirements of organic synthesis, especially industrial production in the field of synthesis of medical intermediates, can be better met. The product has a broad market prospect.
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Paragraph 0045-0047
(2017/02/09)
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- Palladium-catalyzed chemoselective synthesis of indane-1,3-dione derivatives via tert-butyl isocyanide insertion
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A simple and efficient strategy for the synthesis of indane-1,3-dione derivatives through a palladium(0)-catalyzed reaction incorporating tert-butyl isocyanide has been developed. In addition, by applying this protocol as the key step, indenopyrazole derivatives can be easily synthesized in high yields in a one-pot procedure. This methodology is tolerant of a wide range of substrates and applicable to library synthesis.
- Duan, Huaqing,Chen, Zhong,Han, Li,Feng, Yulin,Zhu, Yongming,Yang, Shilin
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p. 6782 - 6788
(2015/06/25)
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- INDANONE AND INDANDIONE DERIVATIVES AND HETEROCYCLIC ANALOGS
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The invention relates to indanone/indandione derivatives and heterocyclic analogs of Formula (I) wherein Ar1, A, B, L1, Y, Z, and (R1)n n are as described in the description; to pharmaceutically acceptable salts thereof, and to the use of such compounds as medicaments, especially as NPS receptor antagonists.
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Page/Page column 63; 84
(2013/05/23)
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- Synthesis, characterization, antimicrobial activities and QSAR studies of some 10a-phenylbenzo[b]indeno[1,2-e][1,4]thiazin-11(10aH)-ones
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A series of 10a-phenylbenzo[b]indeno[1,2-e][1,4]thiazin-11(10aH)-ones (3) has been synthesized and tested for their antimicrobial activity. The antimicrobial evaluation data indicated that compounds, 3b, 3d, 3k and 3m exhibited very promising antibacterial activity and the compounds 3b and 3k exhibited notable activity, almost comparable to penicillin for Staphylococcus aureus and Bacillus subtilis respectively. The derivatives 3g and 3l exhibited high antifungal activity. Moreover, antibacterial activities were more prolific than antifungal activity. The QSAR studies indicated the importance of topological parameters, Kiers second order molecular index (κα 2) and molecular connectivity index (χ) in describing the antibacterial activity and electronic parameters, the energy of highest occupied molecular orbital (HOMO) and the dipole moment (μ) in describing the antifungal activity.
- Mor, Satbir,Pahal, Preeti,Narasimhan, Balasubramanian
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scheme or table
p. 176 - 189
(2012/07/31)
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- Rhodium(II) Acetate Catalysed Reactions of 2-Diazo-1,3-indandione and 2-Diazo-1-indanone with Various Substrates
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Decomposition of 2-diazo-1,3-indandione (3) by rhodium(II) acetate (1) in cyclohexane and in benzene results in overall carbon-hydrogen insertion to give 2-substituted 1,3-indandiones.Anisole, 1, and 3 yield 2-(4-methoxyphenyl)-1,3-indandione (74 percent); benzenes substituted by a single methyl or halogen groups yield the corresponding ortho- and para-substitution products.Spirocyclopropanes are obtained by rhodium(II)-catalyzed additions of 3 to olefins; electron-deficient olefins do not give adducts.Substituted 4H-indenofuran-4-ones and 2,3-disubstituted spiroindene>-1',3'-diones are formed from rhodium(II)-catalyzed reactions of 3 with acetylenes.Reactions of 1 and 3 with cyclohexane, olefins, acetylenes, and arenes involve selective electrophilic carbenic or ylidic processes. 2-Diazo-1-indanone (4) is converted by 1 to 2,2'-bis (48).Thiophenol reacts with 4 and 1 to yield 2-(phenylthio)-1-indanone (49).Cyclopropanations of cyclohexene and styrene by 4 as catalyzed by 1 result in spiroheptane-7,2'-indan>-1-one (50) and 2-phenylspiroinden>-1'(3'H)-one (51), respectively.
- Rosenfeld, M. J.,Shankar, B. K. Ravi,Shechter, H.
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p. 2699 - 2705
(2007/10/02)
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- Reactions of Carbonyl Compounds in Basic Solutions. Part 9. Methoxide-catalysed Cyclization of Benzylidenephthalides and Methyl o-Phenylacetylbenzoates
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The detailed mechanism of the methoxide-catalysed rearrangement of substituted benzylidenephthalides and both normal and pseudo methyl o-phenylacetylbenzoates to form 2-phenylindane-1,3-diones has been studied.A rate-acidity function correlation for the reactions in methanolic dimethyl sulphoxide (DMSO) shows a linear increase in rate with increasing H- to reach a maximum in rate before decreasing, except for the p-nitro substrate.This derivative shows a rate decrease throughout the H- range.The ρ values in methanol and in 94 mol percent methanolic DMSO are 1.7 and -1.6, respectively.The kinetic isotope effect has been observed with kH/kD 0.8-1.0.The equilibrium constants for ring-chain tautomerism of the methyl o-phenylacetylbenzoates have been determined and shown to be independent of substituent and solvent composition.The rate-determining step is the intramolecular attack of the anion of the normal ester on the ester carbonyl group.In methanol and methanolic DMSO of high methanol content this is preceded by the ionization equilibrium of the normal ester.In methanolic DMSO of low methanol content and for the p-nitro substrate, the initial state is the anion itself.
- Bowden, Keith,Chehel-Amiran, Mohsen
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p. 2031 - 2034
(2007/10/02)
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- Hypolipidemic Activity of Indan-1,3-dione Derivatives in Rodents
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A series of 2-substituted indan-1,3-dione derivatives, including alkyl (C-1-C-5), mono- and disubstituted phenyl, and other 2-aryl derivatives, were tested for hypolipidemic activity of CF1 male mice at 20 mg/kg per day.These derivatives reduced both serum cholesterol and triglycerides after 16 days of administration intraperitoneally. 2-(4-Methoxyphenyl)indan-1,3-dione was one of the more active compounds with 41percent reduction of serum cholesterol and 58percent reduction of serum triglyceride levels on day 16.This activity was confirmed in the rat after oral administration. 2-(2-Methylphenyl)- and 2-(4-chlorophenyl)indan-1,3-dione were effective in reducing serum triglyceride levels 58percent and 53percent, respectively, in mice.Serum cholesterol on day 16 was effectively reduced 46percent by 2-(2,4-dimethylphenyl)indan-1,3-dione.The indan-1,3-dione derivatives were more effective than clofibrate in lowering lipid levels in mice.A more detailed study on the effects of 2-(4-methoxyphenyl)indan-1,3-dione demonstrated that key enzymes in the de novo synthesis of lipids were inhibited by the drug lowering tissue levels of lipids but raising those in the feces.The alterations in lipid content of rat lipoprotein fractions by the drug appeared favorable.
- Murthy, A. R.,Wyrick, S. D.,Hall, I. H.
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p. 1591 - 1596
(2007/10/02)
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