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This species, usually called NaHMDS (sodium hexamethyldisilazide), is a strong base used for deprotonation reactions or base-catalyzed reactions. Its advantages are that it is commercially available as a solid and it is soluble not only in ethers, such as THF or diethyl ether , but also in aromatic solvents, like benzene and toluene by virtue ...
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Bis(trimethylsilyl)amine (also known as hexamethyldisilazane and HMDS) is an organosilicon compound with the molecular formula [(CH 3) 3 Si] 2 NH. The molecule is a derivative of ammonia with trimethylsilyl groups in place of two hydrogen atoms.
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This reaction can be optimized by carefully controlling the amount of organolithium reagent addition, or using trimethylsilyl chloride to quench excess lithium reagent. [40] A more common way to synthesize ketones is through the addition of organolithium reagents to Weinreb amides ( N -methoxy- N -methyl amides).
[1] A typical reducing agent is N,N'-bis(trimethylsilyl)-4,4'-bipyridinylidene. Related pyrazine- and cyclohexadiene-based reagents have been developed. They are red or orange THF-soluble solids. The bipyridine reagent is produced by reduction of 4,4'-bipyridine in the presence of trimethylsilyl chloride (Me = CH 3): [2]
N,O-Bis(trimethylsilyl)trifluoroacetamide (BSTFA) is an organosilicon compound. It is a colorless liquid that is very sensitive to traces of water or alcohols. It is often used to convert hydroxyl groups to trimethylsilyl ether groups (Me = CH 3): ROH + CF 3 C(OSiMe 3)NSiMe 3 → CF 3 C(O)NH(SiMe 3) + ROSiMe 3
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