- Electrochemical study of bromide in the presence of 1,3-indandione. Application to the electrochemical synthesis of bromo derivatives of 1,3-indandione
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The electrochemical oxidation of bromide in the presence of 1,3-indandione (1) in water/acetic acid and methanol/acetic acid mixtures has been studied by cyclic voltammetry and controlled-potential coulometry. The results indicate the participation of 1,3-indandione in the bromination reaction. On the basis of the electroanalytical and preparative results a reaction mechanism including electron transfer, chemical reaction and regeneration of bromide was discussed. The electrochemical synthesis of bromo derivatives of 1,3-indandione (2-3) has been successfully performed at constant current, in an undivided cell, in good yield and purity.
- Nematollahi,Akaberi
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- Synthesis of some new fused and spiro heterocyclic compounds under phase transfer catalysis (PTC) conditions
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2BROMO-1, 3-indandione was treated with different nucleophilic reagents under phase transfer catalysis (PTC) conditions to get directly the corresponding fused indenohterocycles or 2-substituted-1, 3-indandione derivatives which were allowed to cyclize af
- Elshafei,Ahmed, Eman A.,Abd El-Raheem
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p. 485 - 494
(2016/08/19)
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- Monobromomalononitrile: An efficient regioselective mono brominating agent towards active methylene compounds and enamines under mild conditions
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The potential of monobromomalononitrile (MBM) as a convenient source of cationic bromine in organic bromination reaction has been explored. Studies reveal that MBM can be a good substitute for N-bromosuccinimide (NBS) in various respects. Enamines and act
- Pathak, Sudipta,Kundu, Ashis,Pramanik, Animesh
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p. 10180 - 10187
(2014/03/21)
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- Dimethylformamide catalyzed synthesis of novel heterocycles - Their characterization and antimicrobial evaluation
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Indandione 1 was brominated to yield 2-bromoIndandione 2, which further reacted with substituted thiocarbamides, carbamides, 2-aminothiophenols, 2-aminophenol, and triazole to furnished 3-substituted aniline-2-thia-4-aza-6,7- benzo-8-oxo-bicyclo[3.3.0]-1(
- Dabholkar, Vijay V.,Patil, Sunil R.,Pandey, Rajesh V.
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p. 403 - 407
(2013/06/26)
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- Highly efficient construction of bisspirooxindoles containing vicinal spirocenters through an organocatalytic modified Feist-Bénary reaction
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We have developed an organocatalytic modified Feist-Bénary reaction of cyclic dicarbonyl compounds, isatins and cyclic α-bromo dicarbonyl compounds. This method affords bisspirooxindole-fused dihydrofurans containing two vicinal spiro centers. To the best
- Ahadi, Somayeh,Khavasi, Hamid Reza,Bazgir, Ayoob
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supporting information
p. 12553 - 12559
(2013/09/23)
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- Oxidative bromination of ketones using ammonium bromide and oxone
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A highly efficient, environmentally safe and economic method for selective α-monobromination of aralkyl, cyclic, acyclic, 1,3-diketones and β-keto esters and α,α-dibromination of 1,3-diketones and β-keto esters without catalyst is reported using ammonium bromide as a bromine source and oxone as an oxidant. The reaction proceeds at ambient temperature and yields range from moderate to excellent. Bromination of unsymmetrical ketones takes place at the less substituted α-position predominantly. Aromatisation of tetralones is also carried out with this reagent system.
- MacHarla, Arun Kumar,Chozhiyath Nappunni, Rohitha,Marri, Mahender Reddy,Peraka, Swamy,Nama, Narender
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supporting information; experimental part
p. 191 - 195
(2012/01/17)
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- Selective monobromination of 1,3-diones with N-bromosaccharin/Mg(ClO 4)2 system in solution and under solvent-free conditions
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N-Bromosaccharin/Mg(ClO4)2 is an effective and regioselective system for α-monobromination of 1,3-dicarbonyl compounds. A wide variety of β-keto esters and 1,3-diketones in reaction with this system afforded a regioselectively α-mono
- Alinezhad, Heshmatollah,Tajbakhsh, Mahmood,Tehrani, Shahram Shahriari
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experimental part
p. 1543 - 1546
(2011/12/04)
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- Ethylenebis(N-methylimidazolium) ditribromide (EBMIDTB): An efficient reagent for the monobromination of 1,3-diketones and β-ketoesters
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Ethylenebis(N-methylimidazolium) ditribromide, a stable crystalline solid, is easily prepared by reaction of the corresponding dibromide salt with bromine in n-hexane. 1,3-Diketones and β-ketoesters can be brominated chemoselectively to the corresponding α-monobrominated products by using this reagent at 0-5°C. Under the same reaction conditions, diethyl malonate, ethyl cyanoacetate, and malonitrile were monobrominated at moderate yield.
- Hosseinzadeh, Rahman,Tajbakhsh, Mahmood,Mohadjerani, Maryam,Lasemi, Zahra
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experimental part
p. 57 - 60
(2010/03/30)
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- Chemoselective bromination of active methylene and methyne compounds by potassium bromide, hydrochloric acid and hydrogen peroxide
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Active methylene and methyne compounds can be chemoselectively brominated in high yields using potassium bromide, hydrochloric acid, and hydrogen peroxide at room temperature. Georg Thieme Verlag Stuttgart.
- Kirihara, Masayuki,Ogawa, Shiho,Noguchi, Takuya,Okubo, Kumiko,Monma, Yoshinari,Shimizu, Ikuko,Shimosaki, Ryuji,Hatano, Akihiko,Hirai, Yoshiro
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p. 2287 - 2289
(2007/10/03)
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- New synthetic methods: Part I - Regioselective 1, 2-transposition of carbonyl group in carbocyclic and heterocyclic ketones
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A convenient and simple synthetic method for 1, 2- transposition of keto group in pyrazol-5-ones, indan-1,3-dione and benzofuran-3-one is described.
- Chande, Madhukar S.,Amle, Anand P.
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p. 2625 - 2627
(2007/10/03)
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- The Conversion of α-Bromo-β-Dicarbonyls to Vicinal Tricarbonyls Using Dimethyldioxirane and Base
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Vicinal tricarbonyls are prepared from α-bromo-β-dicarbonyl precursors by base promoted oxygen transfer from dimethyldioxirane.The α-bromo-β-dicarbonyls were prepared by the reaction of CuBr2 and benzene (Koser's reagent) with a β-dicarbonyl system.
- Coats, Steven J.,Wasserman, Harry H.
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p. 7735 - 7738
(2007/10/02)
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- Condensed Tetrahydrobenzothiazoles: Part III - Synthesis of 2-Aryl-5,6,7,8-tetrahydroimidazobenzothiazoles and 1,2,3,4-Tetrahydrobenzimidazobenzothiazoles and Their 4/5 Carbethoxy Derivatives
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2-Aryl-5,6,7,8-tetrahydroimidazobenzothiazoles (III) have been prepared by the condensation of substituted 2-amino-4,5,6,7-tetrahydrobenzothiazoles (I) with phenacyl bromides (II), while 1,2,3,4-tetrahydrobenzimidazobenzothiazoles (IXa) have
- Balse, Mukta N.,Mahajanshetti, C. S.
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p. 263 - 265
(2007/10/02)
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