5340-80-7Relevant academic research and scientific papers
Effets de cryptands et activation de bases. VI. Reactions d'organo-lithiens.
Perraud, Robert,Handel, Henri,Pierre, Jean-Louis
, p. 283 - 288 (2007/10/02)
Utilization of the cryptand shows the need of electrophilic catalysis by the Li(1+) ion in the nucleophilic addition of organolithium compounds to ketones, esters, or carboxylic acids.When nucleophilic addition is inhibited, organolithium reagents enolyze ketones or esters.When activated by cryptation of Li(1+), organolithium reagents attack ethers in a few minutes.With alkyl halides, only elimination takes place: exchange and nucleophilic substitution are not observed any longer in the presence of the cryptand.Generally speaking, the cryptand seems to enhance the basicity of the organolithium reagent, and nucleophilicity does not manifest itself any more.
SOME ORGANIC LITHIUM COMPOUNDS AS INITIATORS OF THE ANIONIC POLYMERIZATION OF METHYL METHACRYLATE
Lochmann, Lubomir,De, Rajib L.,Janca, Josef,Trekoval, Jiri
, p. 2761 - 2765 (2007/10/02)
The presence of α-lithio ketone in the initiation mixture formed by a reaction between butyllithium and methyl pivalate was demonstrated.In the initiation of the polymerization of methyl methacrylate α-lithio ketones exhibit high efficiency, which can be enhanced by the effect of lithium alkoxides, in particular of lithium tert-butoxide.
