Acetonitrile trichloro

Recently, a method has been described which eliminates the long reflux time needed for completion of the Brown-Laubengayer reaction. Only 2—3 hours refluxing are required for the formation of 2,4,6-trichloro-borazine from the interaction of NH4CI with the acetonitrile-trichloro-borane adduct 44>. The yield is about 60%. No mechanism has been proposed, but it is known that in other B—N ring syntheses (cf. Sections II.2.4. and II.7) the use of trihaloborane complexes is an essential feature. 

Acetonitrile, dibromo-. See Dibromoacetonitrile Acetonitrile, phenyl-. See Phenylacetonitrile Acetonitrile, trichloro. See Trichloroacetonitrile Acetonoxime. See Acetone oxime Acetonyl acetone. See 2,5-Hexanedione 4-Acetonylanisole p-Acetonylanisole. See1-(p-... 

Synonyms Acetonitrile, trichloro T-CAN Cyanotrichloromethane Trichloromethyl cyanide Trichloromethyinitrile... 

Trichloro- and dichloromethane, ether, dioxane, benzene, toluene, chlorobenzene, acetonitrile, or even pyridine itself has been employed to carry out the one-pot syntheses. Tliese solvents allow straightforward preparation of the salts. The temperature range between 0° and 20°C is usually employed and the salts formed are sufficiently soluble. In the case of slow reactions, selection of a solvent with a higher boiling point is prohtable since thermal instability of the A -(l-haloalkyl)heteroarylium halides has not been reported. Addition of water or an aqueous solution of sodium acetate does not cause a rapid decomposition of the salts so that this constitutes a useful step in the optimization of some procedures. 

Other electrochemical processes of organic compounds on Pb electrodes or electrodes with UPD Pb have been studied - formaldehyde [323], oxalic acid [386], trichloro- and trifluoroethane [387], 1-phenylethylamine [388], 3-hydroxychi-nuclidine [388], dichlorodifluoromethane [389], polychlorobenzenes [390], 1-propa-nol [391], pyrrole polymerization [392], and inorganic compounds - phosphine [388] and sulfate(IV) ions [393]. Simultaneous catalytic or inhibiting influence of organic solvents - acetonitrile, dimethyl-sulfoxide, and Pb + presence on electrooxidation of small organic molecules on Pt electrodes has been studied using on-line mass spectroscopy [394],... 

Tellurium tetrachloride and 1,2-hydroxyethane refluxed in acetonitrile formed 1,3,2-dioxatelluracyclopentane 2,2-dichloride as a white solid1. In the presence of ammonium chloride, the ammonium salt of 2,2,2-trichloro-1,3,2-dioxatellurolanate(IV) was isolated2. 

The method has been further improved." Trimethyl(perfluoroalkyl)silanes RpTMS (Rp = c, -C, perfluoroaliphatic groups) are prepared by reaction of perfluoroalkyl halides RpX (X = Br, I) with chlorotrimethylsilane in the presence of tris(dialkylamino)phosphanes in acetonitrile. For example, chlorotrimethylsilane was treated with bromotrifluoromethane and tris(diethylamino)phosphane in acetonitrile at — 40"C for 1 hour to give trimethyl(trifluo-romethyl)silane in 90% yield. Bis(dimethylamino)(trifluoromethyl)silane is available from the reaction of chlorobis(dimethylamino)silane with the system bromotrifluoromethane/tris-(diethylamino)phosphane, while trichloro(trifluoromethyl)silane is prepared by nucleophilic trifluoromethylation of tetrachlorosilane with bromotrifluorornethane/tris(diethylamino)phos-phane. " ... 

The reaction of trimethyl(perfluorophenyl)stannane with germanium(l V) chloride also proceeds smoothly, but the yield of trichloro(perfluorophenyl)germane (II. X = Cl) is rather low. Germanium(lV) bromide completely reacts with trimethyl(perfluorophcnyl)stannane over 22 hours. Apart from bromotrimethyltin. the reaction produces dibromodimethyltin. which makes it diflficult to isolate the target product. The reaction of germanium(IV) chloride with trimethyl(perlluorophenyl)silane does not proceed at a high temperature (240 C, 46 h), or in acetonitrile in the presence of cesium fluoride (50 C. 7 h). 

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