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Lithium Amides

Lithium Amide Fine Chemicals
SubMarket: Lithium Amides
CAS #: 7782-89-0
Description: Lithium amide is a strong base used primarily in organic synthesis. Typical reactions reported for lithium amide include aldol condensations, alkylations of heterocyclic amines, and formation of cyclopropenes. It is also proven an effective catalyst in transesterification reactions.
Lithium Diisopropylamide
Market: Fine Chemicals
SubMarket: Lithium Amides
CAS #: 4111-54-0
Description: Lithium Diisopropylamide is a non-pyrophoric hindered non-nucleophilic strong base widely used for the generation of carbanions1, including the initiation of anionic polymerization2. This product circumvents the generation and evolution of butane associated with the preparation of Lithium Diisopropylamide by the reaction of n-butyllithium and diisopropylamine.

Lithium Hexamethyldisilazide 24% in THF
Market: Fine Chemicals
SubMarket: Lithium Amides
CAS #: 4039-32-1
Description: Lithium Hexamethyldisilazide is a non-pyrophoric strong base, widely employed in organic synthesis as a metalation agent. The principle advantages of this reagent are the improved selectivity obtained in deprotonation reactions and the enhanced thermal stability. It is employed as a base in generating enolates for the preparation of lactone precursors. Lithium Hexamethyldisilazide is offered in THF solution and therefore, is very easy to transfer from shipping container to storage or a reactor. Lithium Hexamethyldisilazide is a more stable base than Lithium Diisopropylamide or lithium diisopropylamide.
Lithium Diisopropylamide, typ. 25 % solution in Heptane/ THF/Ethylbenzene (typ. 1.9 M)
Mol. Formula C6H14LiN
EINECS-No 223-893-0
CAS-No 4111-54-0
Specification LDA (active base) 24 - 26 % (1.9 M) THF 17 - 27 % technical Heptane 31 - 39 %
Ethylbenzene 11 - 15 % Diisopropylamine max. 4 %
Application strong, low-nucleophilic base for e.g. enolisations

Lithium Diisopropylamide, typ. 28 % solution in Heptane/THF/Ethylbenzene (typ. 2.1 M)
Mol. Formula C6H14LiN
EINECS-No 223-893-0
CAS-No 4111-54-0
Specification LDA (active base) 27 - 29 % (2.1 M)
THF techn. Heptane 26 - 34 % 21 - 31 %
Ethylbenzene 13 - 17 %
Diisopropylamine max. 4 %
Application strong, low-nucleophilic base for e.g. enolisations
Lithium hexamethyldisilazide or Lithium bis-(trimethylsilyl)amide, typ. 95 %
Mol. Formula LiN[Si(CH3)3]2
EINECS-No 223-725-6
CAS-No 4039-32-1
Specification assay of LHMDS (active base) at least: 95 %
Application Selective low nucleophilic base for e. g. enolisations

Lithium hexamethyldisilazide, typ. 20 % solution in THF/Ethylbenzene (typ. 1.1 M)
Mol. Formula C6H18LiNSi2
EINECS-No 223-725-6
CAS-No 4039-32-1
Specification LHMDS (activ base) 19-21% THF: typ. 74 % Ethylbenzene max. 9%
Application Selective low nucleophilic base for e.g. enolisations
Lithium hexamethyldisilazide , typ. 24 % solution in THF with 2-Methyl-2-butene (typ. 1.3 M)
Mol. Formula C6H18LiNSi2
EINECS-No 223-725-6
CAS-No 4039-32-1
Specification LHMDS (activ base) 19-21% THF: typ. 74 % Ethylbenzene max. 9%
THF 68-74%
2-Methyl-2-butene max. 6%
Application Selective low nucleophilic base for e.g. enolisations

Lithium hexamethyldisilazide, typ. 25% solution in Toluene/Ethylbenzene (typ. 1.3 M)
Mol. Formula C6H18LiNSi2
EINECS-No 223-725-6
CAS-No 4039-32-1
Specification LHMDS (active base) 23-27%
Toluene: typ. 66-70%
Ethylbenzene: max. 9%
Application Selective low nucleophilic base for e.g. enolisations
Lithium Amide, milled
Mol. Formula LiNH2
EINECS-No 231-968-4
CAS-No 7782-89-0
Specification  
Application
Claisen condensation, Aldol condensation Alkylation of nitriles, ketones, amines, alkynes Synthesis of ethynyl compounds and antihistamines Transesterification Catalyst for the anionic polymerization of acrylonitrile and methacrylonitrile
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