- Highly efficient synthesis of trimethylarsine
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A convenient, highly efficient, and environmentally safe procedure for the preparation of trimethylarsine was proposed. A quantitative yield of this compound in the reaction of As2O3 with AlMe3 was attained for the first time by using mechanochemical activation of the process.
- Gavrilenko,Chekulaeva,Pisareva
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- Synthesis of trimethylated phosphonium and arsonium analogues of the osmoprotectant glycine betaine; contrasted biological activities in two bacterial species
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Phosphoniobetaine and arsenobetaine, the P and As analogues of glycine betaine (trimethylammonioacetate) were synthesized and assayed for activity in bacterial osmoprotection biotests, using Escherichia coli and Rhizobium meliloti as model organisms. The P- and As-betaines displayed similar osmoprotective activities in E. coli, but were highly toxic in the betaine- demethylating bacterium R. meliloti.
- Pichereau, Vianney,Cosquer, Anne,Gaumont, Annie-Claude,Bernard, Theophile
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- Synthesis of a Homologous Series of Trialkyl Arsines (C3-C12) and Applications of Arsenic Triiodide as a Synthetic Precursor
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This work presents some modifications in the post-synthetic processing for a classical arsenic reagent: AsI3. In comparison with the widely used analog, the trichloride, arsenic triiodide presents several advantages such as low toxicity, air stability, and low volatility. It was used as a synthetic precursor in the preparation of a variety of arsenic(III) derivatives like arsines, arsenites, and thioarsenites. Besides that, AsI3 was submitted to a diversity-oriented Grignard reaction in the preparation of a homologous series of trialkyl arsines ranging from AsC3H9 to AsC12H27. The series was analyzed by comprehensive two-dimensional gas chromatography coupled with time-of-flight mass spectrometry to provide a trialkyl arsines library that can be used for the direct analysis of natural samples.
- Ligiéro, Carolina B.P.,Francisco, Marcos A.S.,Gama, Michelle S.,Carbonezi, Carlos A.,Leocadio, Isabela C.L.,de Souza, Wladmir F.,Esteves, Pierre M.
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p. 912 - 916
(2021/03/17)
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- Demethylation of Methylated Arsenic Species during Generation of Arsanes with Tetrahydridoborate(1-) in Acidic Media
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Demethylation during generation of volatile hydrides (HG), i.e. formation of noncorresponding arsanes from monomethylarsonic acid (MAsV), dimethylarsinic acid (DMAsV), and trimethylarsine oxide (TMAsVO) by the reaction of
- Marschner, Karel,Musil, Stanislav,Dědina, Ji?í
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p. 6366 - 6373
(2016/07/06)
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- Trialkyl Group VA metal compounds
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Disclosed are methods of preparing trialkyl Group VA metal compounds in high yield and high purity. Such trialkyl Group VA metal compounds are substantially free of oxygenated impurities, ethereal solvents and metallic impurities.
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- Synthesis of Trimethylarsenic
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Simple and convenient procedure for preparing trimethylarsenic in the yield exceeding 90% by reaction of As2O3 with Me3Al was proposed.
- Yablokov,Mitrofanova,Krasnodubskaya,Dozorov,Devyat'yarov
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p. 570 - 571
(2007/10/03)
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- Metal alkyl process
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Metal alkyls such as trimethyl arsine are made in improved yields by reacting a metal halide, e.g. AsCl3, with a Grignard reagent such as methyl magnesium bromide complexed with a polyether such as di(2-methoxyethyl)ether.
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- Isolation, Crystal Structure and Synthesis of Arsenobetaine, a Constituent of the Western Rock Lobster, the Dusky Shark, and Some Samples of Human Urine
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Arsenobetaine has been isolated from the tail muscle of the western rock lobster (Panulirus cygnus George) and from the flesh of the dusky shark (Carcharhinus obscurus Le Sueur), both of which are commercially important seafoods.Trigonelline has also been isolated from the lobster and both arsenobetaine and trigonelline have been isolated from human urine obtained after ingestion of cooked rock lobster. The crystal structures of the monohydrates of arsenobetaine and trigonelline have been determined and a simple synthesis of arsenobetainehas been developed.
- Cannon, Jack R.,Edmonds, John S.,Francesconi, Kevin A.,Raston, Colin L.,Saunders, Janice B.,et al.
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p. 787 - 798
(2007/10/02)
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