Copper(I) or (II)-mediated conjugate addition or dimerisation of functionalised organolithium compounds
作者:Isidro M Pastor、Miguel Yus
DOI:10.1016/s0040-4039(99)02336-9
日期:2000.3
different functionalised organolithium intermediates 1–3 with several electrophilic olefins 6 (2-cyclopentenone, 2-cyclohexenone, methyl vinyl ketone, benzylideneacetone, benzylideneacetophenone and ethyl acrylate) in the presence of copper(I) salts (bromide and iodide) in THF at −78°C gives, after hydrolysis with ammonium chloride, the expected products resulting from a conjugateaddition. In the presence
New reactivity of functionalised organolithium compounds in the presence of Cu(I) or Cu(II) salts: conjugate addition, acylation or dimerisation
作者:Isidro M Pastor、Miguel Yus
DOI:10.1016/s0040-4020(01)00105-3
日期:2001.3
compounds 1 with electrophilic olefins 2 in the presence of copper(I) iodide and HMPA in THF at −78°C leads, after hydrolysis with a saturated solution of ammonium chloride, to the corresponding products 3 resulting from a conjugate addition. The same process but using an acyl chloride instead of the electrophilic olefins affords the expected ketone 4 from an acylation process. Finally, when intermediates
Lewis acid-promoted conjugate addition of functionalised organolithium compounds to electrophilic olefins
作者:Miguel Yus、Isidro M Pastor、Joaquı́n Gomis
DOI:10.1016/s0040-4020(01)00514-2
日期:2001.7
The reaction of several functionalised organolithiumcompounds 1–3 with different α,β-unsaturated ketones or esters 4–12 in the presence of a Lewis acid [ZnX2 (X=Cl, Br, I), AlCl3, FeCl3, BF3] leads, after hydrolysis, mainly to 1,4-addition products 13–31.