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
91. The preparation of 1-substituted 1 : 2 : 3 : 4-tetrahydrophosphinolines and 2-substituted 1 : 2 : 3 : 4-tetrahydroisophosphinolines
作者:M. H. Beeby、Frederick G. Mann
DOI:10.1039/jr9510000411
日期:——
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