Ethylene derivatives compounds, synthesi

Hydrocarbons from acoxy compounds frans-Ethylene derivatives—Stereospecific synthesis... 

Alkylation of aluminum with ethylene yields products that find application as initiators and starter compounds in the production of a-olefins and linear primary alcohols, as polymerization catalysts, and in the synthesis of some monomers like 1,4-hexadiene. Triethyl aluminum [97-93-8], A1(C2H5)3, is the most important of the ethylene-derived aluminum alkyls. 

Synthesis of aliphatic nitro compounds from ethylene derivatives... 

Aluminum chloride Synthesis of ethylene derivatives from 0X0 compounds... 

Triphenylphosphinelethylene oxide Ethylene derivatives from halides and 0x0 compounds Shortened Wittig synthesis... 

Olefins s. Ethylene derivatives a-Olefins s. Ethylene derivatives, terminal Oligonucleotides, removal of 0-prolective groups 21, 25 —, solid-phase synthesis 19, 33 suppl. 21 Orgaiiometallic compounds (s. a. under individual metals. Metal complex compounds)... 

Synthesis of monoorganomercury compounds from ethylene derivatives and active methylene groups via acetoxymonoorganomercury compounds... 

Sodium hydride dimethyl sulfoxide Ring closures with sulfoxonium and sulfonium salts Synthesis of oxido compounds from oxo compounds Cyclopropanes from ethylene derivatives... 

The development 0/ the chemistry of boranes continues with outstanding results It has produced a convenient route to the less stable, terminally unsaturated compounds from the more stable, highly substituted ethylene derivatives , a facile procedure for the asymmetric synthesis of alcohols of high optical purity , and a... 

Coupling of ethylene derivatives via boranes Synthesis of 0x0 compounds from ot,/ -ethylenoxo compounds... 

Tricyclic Antidepressants. Imipramine [50-49-7] (32), which was the first tricycHc antidepressant to be developed, is one of many useful psychoactive compounds derived from systematic molecular modifications of the antihistamine prometha2ine [60-87-7] (see Histamine and histamine antagonists). The sulfur atom of prometha2ine was replaced with an ethylene bridge and the dimethylamino group attached to an / -propyl group, rather than to an isopropyl one, of the side chain. The actual synthesis of (32) is typical of the compounds in this class (37). 

Negishi et al. reported the regioselective synthesis of diisoalkyl derivatives from monosubstituted alkenes in yields ranging from 58-95%, Scheme 8, from the in situ prepared ethylene complex Cp2Zr(C2H4).35 The zirconocene-ethylene complex presumably undergoes alkene insertion to furnish a zirconacyclopentane which further reacts with diethylzinc to yield the diisoalkylzinc compound. 

The electrophilic bromination of ethylenic compounds, a reaction familiar to all chemists, is part of the basic knowledge of organic chemistry and is therefore included in every chemical textbook. It is still nowadays presented as a simple two-step, trans-addition involving the famous bromonium ion as the key intermediate. T]nis mechanism was postulated as early as the 1930s by Bartlett and Tarbell (1936) from the kinetics of bromination of trans-stilbene in methanol and by Roberts and Kimball (1937) from stereochemical results on cis- and trans-2-butene bromination. According to their scheme (Scheme 1), bromo-derivatives useful as intermediates in organic synthesis... 

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