Reaction with aluminium iodide

The radicals produced may react with molecules of solvent, hydrocarbon, hydrocarbon anion or may dimerize. Reaction with methyl iodide and subsequent determination of iodide anion in the aqueous extract is a recommended method for analyzing compounds like sodium-naphthalene. The etching of polytetrafluorethylene is an interesting example of the reduction of halides an active surface is produced which is then able to form strong bonds to an epoxy resin. The reducing action of hydrocarbon anions has been used in the preparation of metal carbonyls. In this it is commonly convenient to start from the salt of a metal in a +2 or +3 oxidation state, which must be reduced to the zero oxidation state both sodium-naphthalene and aluminium alkyls have been used in this connection. 

Product distributions from the disproportionation of l,l,2,3-tetrachloro-3, 3-difluoropropene (2CFsCFCCl CClj- CFj Ca Cai+CFa,CCI CCIg 2CFCljCCl CCl4- CF,ClCa CCl, + CCl,Ca Ca,) at 50 C with aluminium halides, titanium tetrachloride, and antimony pentachloride have been determined. Formation of the bromo-olefin CF,-CCl CBrCl in the reaction with aluminium bromide was rationalized in trams of the HSAB concept, and related known reactions were interpreted similarly. Replacement of vinylic fluorine by iodine has been shown to occur udien tetrafluoro-ethylene or chlorotrifluoroethylene is treated with methyl iodide and aluminium chloride. ... 

The reduction of methyl 6-methoxy-2-naphthyl acetate with lithium aluminium hydride in refluxing ether gives 2-(6-methoxy-2-naphthyl)ethanol, which by treatment with PBr3 in refluxing benzene is converted into 2-(6-methoxy-2-naphthyl)ethyl bromide. Further reaction with KCN in refluxing ethanol-water affords 3-(6-methoxy-2-naphthyl) propionitrile, which is finally treated with methylmagnesium iodide in refluxing ethanol. 

Hydrobromic acid, ferric bromide, and the chlorides and bromides of zinc and aluminium all react in an analogous manner.1 With potassium iodide in the presence of a zinc salt the reaction is quantitative, and may be used in the volumetric estimation of ferricyanides —2... 

Factors analogous to those which limit the stability of perfluoroalkylboron compounds are even more dominant in the case of aluminium. Indeed, no perfluoroalkyl derivatives of tri-covalent aluminium have been obtained, although salts of the type Li[( -C3F7)2All2] are produced [83] in reactions of perfluoroalkyl iodides with LiAlH4. 

The structure of corynoloxine (242), from Corydalis incisa, is a further example of the rare and interesting 13-methylbenzophenanthridine alkaloids.232,233 Emde degradation of corynoloxine methiodide gave both theoretically possible products (243) and (244). Catalytic reduction of either base gave the same neutral derivative (245).232 Lithium aluminium hydride reduction of (242) gave coryno line (246), an alkaloid previously isolated from the same plant species. The same tetracyclic compound (245) was obtained by a three-reaction sequence [quater-nization with methyl iodide, Emde degradation to (247), and basic hydrolysis]... 

With the exception of 4-(1,1,3,3-tetramethylbutyl)phenol prepared from diisobutylene, all the mutti-branched alkylphenols discussed consist of isomeric mixtures. In the pursuance of structure/property interests several studies have aimed to synthesise pure compounds. Thus by Wurtz-type methodology the reaction of the isomeric chloroanisoles with (i) alkyl iodides in ethereal solution in the presene of sodium and (ii) demethylation of the resultant alkylanisoles with aluminium bromide, a range of C5, Cg and Cg alkylanisoles has been synthesised (ref. 14). Numerous other methods are available for the synthesis of the isomeric n-, iso-, sec- and tert-alkylphenols some of which are referred to in Chapter 13. Reaction of a mixture of the appropriate alkyl chloride and 2-,... 

A high yield of methylphosphonous dichloride can be obtained by heating phosphorus trichloride with methyl iodide and aluminium trichloride. A complex is first formed (Kinnear-Perrin reaction), and this can then be reduced with aluminium (6.151). In an extension of this reaction, dimethyl-phosphinous chloride can be obtained from the monomethyl compound by treatment with methyl and aluminium chlorides in a similar way (6.152). 

This ligand class was thoroughly investigated by Jager in the 1980s and can be easily synthesised from the commercially available diethyl ethoxy-methylenemalonate and a suitable diamino spacer. The aluminium complex obtained via reaction with diethyl aluminium chloride efficiently catalyses the formation of propylene carbonate at 80 °C and 50 bar carbon dioxide (0.2 mol% catalyst). From the three ammonium salts tested as cocatalysts, tetrabutylammonium bromide again gave the best results (propylene carbonate yield 94%) followed by the tetrabutylammonium iodide (91%) and chloride (85%). 

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