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2-Benzothiazolyl lithium, reaction with

Benzothiazolyl-lithium (70), prepared from benzothiazole and n-butyl-lithium in THF at —80 C, reacts in situ with the appropriate chlorosilanes to afford mono- (71) and di-(2-benzothiazolyl)silanes (72) (see also these Reports, Vol. 2, p. 672). The latter are also formed in higher yields from (71) by a novel trans-silylation reaction. The assigned structures of the silylbenzothiazoles are in agreement with their observed n.m.r. spectra. The compounds are colourless, stable substances, of considerable reactivity. [Pg.630]

Reaction of BTSP with 2-benzothiazolyl allyl lithium proceeds in a regioselective and stereoselective manner leading to the silyloxylation and the trans methylation product (Scheme 9). [Pg.798]

The chemistry of pyridylphosphines has been reviewed. Further studies have appeared of the reactions of phosphines bearing 2-pyridyl or 2-benzothiazolyl substituents with butyl-lithium, which result in the formation of biaryl coupling products via an initial nucleophilic attack at phosphorus. A study of the de-diazoniation of arenediazonium salts using triphenylphosphine (and trialkylphosphites) indicates that the reactions proceed via a radical-chain mechanism, initiated by single electron transfer from the phosphine to the diazonium salt, to give... [Pg.19]


See other pages where 2-Benzothiazolyl lithium, reaction with is mentioned: [Pg.40]    [Pg.28]    [Pg.166]    [Pg.421]   


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Reaction with lithium

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