Lithium Diisopropylamide CAS 4111-54-0

Lithium diisopropylamide (LDA) is a white pyrophoric powder. Freshly prepared, it is soluble in hydrocarbons (in hexane about 10 %), but it tends to precipitate irreversibly from solution as a polymer on heating or prolonged storage. In ethers the solubility is much higher, but with the exception of tetrahydropyran, LDA is decomposed at a rate depending on the ether, concentration, and temperature.

Lithium diisopropylamide is a sterically hindered nonnucleophilic strong base used for selective deprotonations, especially for the production of kinetic enolates (i.e., the thermodynamically less favored isomer) and (hetero-)aromatic carbanions. In the production of the serum lipid regulating agent Gemfibrozil one key intermediate is formed by quenching an ester enolate with 1-bromo-3-chloropropane.

Lithium diisopropylamide solution (LDA) can be used:

• As an initiator in the anionic polymerization of D,L-lactide and methyl methacrylate.
• To facilitate ester enolization.
• To convert carboxylic acids to enediolate intermediates for preparing trifluoromethyl ketones.
• In ortho-lithiation of arylsulfonyloxazolidinones to prepare N-substituted saccharin analogs.
• To catalyze ortholithiation and Fries rearrangement of aryl carbamates.
• As a promoter in the isomerization of allylic ethers to (Z)-propenyl ethers.

Peb muaj ntau lub Hoobkas zoo nrog kev koom tes sib sib zog nqus, uas tuaj yeem muab koj cov khoom zoo thiab cov nqi sib tw. Thiab peb tseem tuaj yeem muab cov luv nqi rau kev yuav khoom ntau.Thiab peb koom tes nrog ntau lub tuam txhab xa khoom xa tuaj, tuaj yeem xa cov khoom lag luam kom nyab xeeb thiab ntseeg nkaws rau koj txhais tes. Lub sij hawm xa tuaj yog li 3-20 hnub tom qab tau txais kev pom zoo ntawm kev them nyiaj.

Product Name:	Lithium diisopropylamide
Synonyms:	ithium diisopropyL;LITHIUM DIISOPROPYLAMIDE THF COMPLEX;LITHIUM DIISOPROPYLAMINE;LITHIUM DIISOPROPYLAMIDE;LDA THF COMPLEX;LDA;DIISOPROPYLAMINOLITHIUM;Lithium diisopropylamide solution
CAS:	4111-54-0
MF:	C6H16LiN
MW:	109.14
EINECS:	223-893-0
Product Categories:	Classes of Metal Compounds;
Mol File:	4111-54-0.mol

1. Koj puas yog lub Hoobkas lossis tuam txhab lag luam?
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