Lithium tetramethylpiperidide
Lithium tetramethylpiperidide (often abbreviated LiTMP or LTMP) is a chemical compound with the molecular formula LiC9H18N. It is used as a non-nucleophilic base, being comparable to LiHMDS in terms of steric hindrance. SynthesisIt is synthesised by the deprotonation of 2,2,6,6-tetramethylpiperidine with n-butyllithium at −78 °C. Recent reports show that this reaction can also be performed 0 °C.[1] The compound is stable in a THF/ethylbenzene solvent mixture and is commercially available as such. StructureLike many lithium reagents it has a tendency to aggregate, forming a tetramer in the solid state.[2]  See alsoReferences
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