The lithiation of primary and secondary dialkylsulfates with an excess of lithium powder in the presence of a catalytic amount of naphthalene (4 mol %) in THF at −78°C leads to the corresponding alkyllithium reagents (1:2 molar ratio) which react with different electrophiles, mainly carbonyl compounds, to yield after hydrolysis, the expected coupling products. This methodology represents an indirect
作者:Jack E. Baldwin、Robert M. Adlington、Jeffery C. Bottaro、Jayant N. Kolhe、Ian M. Newington、Matthew W.D. Perry
DOI:10.1016/s0040-4020(01)87648-1
日期:1986.1
The lithium salts of trityl- and diphenyl-4-pyridylmethyl-hydrazones of both aldehydes and ketones react with electrophiles (alkyl halides, aldehydes, ketones, crotonates) at low temperature to form C-trapped azo compounds ; these Intermediates decompose homolytically with loss of nitrogen below room temperature and can be diverted in a synthetically useful way to alkanes, alkenes, alcohols or saturated
Naphthalene-catalysed lithiation of dialkyl sulfates: A new route for organolithium reagents
作者:David Guijarro、Balbino Mancheño、Miguel Yus
DOI:10.1016/s0040-4039(00)61156-5
日期:1992.9
The lithiation of primary and secondary dialkyl sulfates with an excess of lithium powder in the presence of a catalytic amount of naphthalene at −78°C leads to the corresponding alkyl-lithium reagents (1:2 molar ratio), which react with different electrophiles, mainly carbonyl compounds, to yield the expected coupling products. This methodology represents an indirect way for transforming alcohols
Synthesis of organolithium compounds from phenyl selenides
作者:Alain Krief、Abdesslame Nazih、Myriam Hobe
DOI:10.1016/0040-4039(95)01689-f
日期:1995.10
Alkyl aryl selenides react with lithium arenides to produce, regioselectively, alkyllithiums and lithium arylselenolates. Experimental conditions, especially the temperature, have a profound effect on the course of this reaction and on the nature of the products.
作者:Paul S. Fordred、D. Gangani Niyadurupola、Richard Wisedale、Steven D. Bull
DOI:10.1002/adsc.200900309
日期:2009.10
Treatment of allylicalcohols containing a 1,1-disubstituted alkene with a palladium catalyst and hydrogen gas (1 bar) results in facile isomerization to their corresponding trisubstituted (E)-allylic alcohols, along with small amounts of the corresponding hydrogenated products.