The Experts below are selected from a list of 2454 Experts worldwide ranked by ideXlab platform
D K Dubey - One of the best experts on this subject based on the ideXlab platform.
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n n dichloro bis 2 4 6 trichlorophenyl urea cc 2 an efficient reagent for the synthesis of α chloro nitroso compounds
Tetrahedron Letters, 2007Co-Authors: Arvind Kumar Gupta, Jyotiranjan Acharya, Deepak Pardasani, D K DubeyAbstract:A simple, efficient, rapid, and mild method for the synthesis of α-chloro-nitroso compounds is described using bis(2,4,6-trichlorophenyl)urea (CC-2).
Kei Manabe - One of the best experts on this subject based on the ideXlab platform.
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pd catalyzed external co free carbonylation preparation of 2 4 6 trichlorophenyl 3 4 dihydronaphthalene 2 carboxylate
Organic Syntheses, 2020Co-Authors: Hideyuki Konishi, Tsuyoshi Ueda, Kei Manabe, Jennifer Ciesielski, Erick CarreiraAbstract:Palladium-catalyzed carbonylation of organic (pseudo)halides has received much attention because of its versatility for the synthesis of carbonyl-containing compounds. This article discusses the preparation of 2,4,6-trichlorophenyl 3,4-dihydronaphthalene-2-carboxylate using Pd-catalyzed external-CO-free carbonylation. It also discusses the characterization data of 2,4,6-trichlorophenyl 3,4-dihydronaphthalene-2-carboxylate. Keywords: Pd-Catalysis; 2,4,6-Trichlorophenyl formate; 2,4,6-Trichlorophenyl 3,4-dihydronaphthalene-2-carboxylate; 3,4-Dihydronaphthalen-2-yl trifluoromethanesulfonate
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trichlorophenyl formate highly reactive and easily accessible crystalline co surrogate for palladium catalyzed carbonylation of aryl alkenyl halides and triflates
ChemInform, 2013Co-Authors: Tsuyoshi Ueda, Hideyuki Konishi, Kei ManabeAbstract:The Pd-catalyzed coupling of aryl/alkenyl halides and triflates with reagent (II) allows an efficient access to a number of trichlorophenyl esters.
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trichlorophenyl formate highly reactive and easily accessible crystalline co surrogate for palladium catalyzed carbonylation of aryl alkenyl halides and triflates
Organic Letters, 2012Co-Authors: Tsuyoshi Ueda, Hideyuki Konishi, Kei ManabeAbstract:The high utility of 2,4,6-trichlorophenyl formate, a highly reactive and easily accessible crystalline CO surrogate, is demonstrated. The decarbonylation with NEt3 to generate CO proceeded rapidly at rt, thereby allowing external-CO-free Pd-catalyzed carbonylation of aryl/alkenyl halides and triflates. The high reactivity of the CO surrogate enabled carbonylation at rt and significantly reduced the quantities of formate to near-stoichiometric levels. The obtained trichlorophenyl esters can be readily converted to a variety of carboxylic acid derivatives in high yields.
Bantwal Shivarama Holla - One of the best experts on this subject based on the ideXlab platform.
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synthesis antimicrobial and anti inflammatory activities of some 1 2 4 triazolo 3 4 b 1 3 4 thiadiazoles and 1 2 4 triazolo 3 4 b 1 3 4 thiadiazines bearing trichlorophenyl moiety
European Journal of Medicinal Chemistry, 2008Co-Authors: Prakash Karegoudar, Jagdeesh D Prasad, Mithun Ashok, Manjathuru Mahalinga, Boja Poojary, Bantwal Shivarama HollaAbstract:Abstract The reaction of 2,3,5-trichlorobenzoic acid hydrazide with carbon disulfide and potassium hydroxide followed by treatment with hydrazine hydrate afforded 3-(2,3,5-trichlorophenyl)-4-amino-1,2,4-triazole-5-thione (6). Alternatively, this triazole was also synthesized by fusing 2,3,5-trichlorobenzoic acid with thiocarbohydrazide. Condensation of (6) with various aromatic carboxylic acids in the presence of phosphorous oxychloride or with phenacyl bromides afforded two series of fused heterocycles namely 6-(substituted aryl)-3-(2,3,5-trichlorophenyl)-[1,2,4]triazolo[3,4-b][1,3,4]thiadizoles (7) and 6-(substituted aryl)-3-(2,3,5-trichlorophenyl)-7H-[1,2,4]triazolo[3,4-b][1,3,4]thiadiazines (8), respectively. The structures of these newly synthesized compounds are characterised by elemental analysis, IR, 1H NMR and mass spectroscopic studies. All the synthesized compounds were screened for their antimicrobial and anti-inflammatory activities. Some of the compounds exhibited promising antimicrobial and anti-inflammatory activities.
M P Kaushik - One of the best experts on this subject based on the ideXlab platform.
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n n dichlorobis 2 4 6 trichlorophenyl urea cc 2 as a new reagent for the synthesis of pyrimidone and pyrimidine derivatives via biginelli reaction
Tetrahedron Letters, 2011Co-Authors: B. N. Acharya, Sanjeev K Verma, M P KaushikAbstract:A simple and efficient method for the synthesis of 3,4-dihydropyrimidin-2-(1H)one and benzo[4,5]imidazo/thioazo[1,2-a]pyrimidine derivatives has been described using N,N′-dichlorobis(2,4,6-trichlorophenyl)urea (CC-2) as a new reagent. This method is found to be efficient and convenient for the synthesis of pyrimidone and pyrimidine derivatives.
Zijian Wang - One of the best experts on this subject based on the ideXlab platform.
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levels and spatial distribution of chlorophenols 2 4 dichlorophenol 2 4 6 Trichlorophenol and pentachlorophenol in surface water of china
Chemosphere, 2008Co-Authors: Jijun Gao, Linghua Liu, Xiaoru Liu, Huaidong Zhou, Shengbiao Huang, Zijian WangAbstract:The chlorophenol pollutants (CPs) have been reported to occur at relatively high concentrations in some Chinese waters. To map the distribution of CPs in the surface water throughout China, samples were collected from over 600 sites in the seven major watersheds and three drainage areas. The samples were analyzed for the representative CPs including 2,4-dichlorophenol, 2,4,6-Trichlorophenol, and pentachlorophenol. In general, it was observed that 2,4-dichlorophenol and 2,4,6-Trichlorophenol were more frequently detected at higher concentrations in the rivers of North China compared with those of South China. High concentration sites of 2,4-dichlorophenol and 2,4,6-Trichlorophenol mainly Occurred in the Yellow River, Huaihe River, and Haihe River watersheds, while pentachlorophenol contamination mainly occurred in the Yangtze River watershed. The pentachlorophenol was the most ubiquitous CPs being detected in 85.4%) of samples (median = 50.0 ng l (- 1); range < 1.1 - 594.0 ng l (- 1)), 2,4-dichlorophenol was detected in 51.3% (median = 5.0 ng l (- 1); range < 1.1 - 19960.0 ng l (- 1)) and the 2,4,6-Trichlorophenol was detected in 54.4% of water samples (median =2.0 ng l (- 1), range < 1.4 - 28650.0 ng l (- 1)). The results of this investigation indicated that 2,4-dichlorophenol and 2,4,6-Trichlorophenol contaminations of Yellow River, Huaihe River, and Haihe River watersheds were of particular concern, while the pentachlorophenol contamination mainly occurred in the Yangtze River watershed. These results showed that CPs contamination in the surface water of China was similar to other places of the world. (c) 2007 Elsevier Ltd. All rights reserved.
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levels and spatial distribution of chlorophenols 2 4 dichlorophenol 2 4 6 Trichlorophenol and pentachlorophenol in surface water of china
Chemosphere, 2008Co-Authors: Jijun Gao, Linghua Liu, Xiaoru Liu, Huaidong Zhou, Shengbiao Huang, Zijian WangAbstract:The chlorophenol pollutants (CPs) have been reported to occur at relatively high concentrations in some Chinese waters. To map the distribution of CPs in the surface water throughout China, samples were collected from over 600 sites in the seven major watersheds and three drainage areas. The samples were analyzed for the representative CPs including 2,4-dichlorophenol, 2,4,6-Trichlorophenol, and pentachlorophenol. In general, it was observed that 2,4-dichlorophenol and 2,4,6-Trichlorophenol were more frequently detected at higher concentrations in the rivers of North China compared with those of South China. High concentration sites of 2,4-dichlorophenol and 2,4,6-Trichlorophenol mainly occurred in the Yellow River, Huaihe River, and Haihe River watersheds, while pentachlorophenol contamination mainly occurred in the Yangtze River watershed. The pentachlorophenol was the most ubiquitous CPs being detected in 85.4% of samples (median=50.0ngl(-1); range <1.1-594.0ngl(-1)), 2,4-dichlorophenol was detected in 51.3% (median=5.0ngl(-1); range <1.1-19960.0ngl(-1)) and the 2,4,6-Trichlorophenol was detected in 54.4% of water samples (median=2.0ngl(-1), range <1.4-28650.0ngl(-1)). The results of this investigation indicated that 2,4-dichlorophenol and 2,4,6-Trichlorophenol contaminations of Yellow River, Huaihe River, and Haihe River watersheds were of particular concern, while the pentachlorophenol contamination mainly occurred in the Yangtze River watershed. These results showed that CPs contamination in the surface water of China was similar to other places of the world.
