66639-74-5Relevant articles and documents
A β,β-Shielded Vinyllithium Example for a Quantification of Structure, Monomer-Dimer Equilibrium, and some Reactivity Parameters
Knorr, Rudolf,Freudenreich, Johannes,Polborn, Kurt,Noeth, Heinrich,Linti, Gerald
, p. 5845 - 5860 (1994)
Key Words: Aggregation, crystal structure, lithiation, organolithium compounds, reactivity.Crystalline 2-(lithiomethylene)-1,1,3,3-tetramethylindan (3) forms the etherate 11 as a centrosymmetric dimer with a LiCLiC four-membered ring.The carbanionic termi
Structural NMR Investigations on Allyllithium Compounds
Balzer, Hartmut,Berger, Stefan
, p. 733 - 738 (2007/10/02)
Four differently substituted phenylallyllithium compounds Li*2 have been investigated by dynamic 1H- and 13C-NMR, NOESY and HOESY spectroscopy.It is shown that a considerable barrier of rotation (ca. 40 kJ/mol) between the phenyl and the allyl moiety exis
Differential NMR Shielding by Phenyl, Assigned from Chemical Labelling and (Z,E) Equilibration
Knorr, Rudolf,Hintermeyer-Hilpert, Monika,Boehrer, Petra
, p. 1137 - 1141 (2007/10/02)
Unequivocal NMR assignments of the (E,Z) isomeric pairs 3 and 8 are possible by (Z,E) equilibration.Deprotonation of 2-methyl-1-phenylpropene (1) with n-BuLi under any conditions gives only a single allyl-metal derivative 2.Methylation of the latter gives
2-Methyl-1-phenyl-1-propenyllithium. A Vinyllithium Derivative Showing Catalyzed Transmetalation
Knorr, Rudolf,Lattke, Ernst
, p. 2116 - 2131 (2007/10/02)
Full preparative and kinetic details are given for the apparent vinyl-to-allyl anion rearrangement of the title compound 1.The rapid and quantitative formation of the allyllithium derivative 7 is shown to be catalyzed by 2-methyl-1-phenyl-1-propene (2).An intermolecular transmetalation mechanism with de-aggregation and ionization steps is suggested to explain the orders of reaction, parameters of activation, and solvent dependency.
