Trialkylaluminium reagent

Cu(i(-catalyzed kinetic resolutions of racemic, cyclic 1,3-diene monoepoxides through the use of dialkylzinc [123] or trialkylaluminium reagents [124] have re-... 

The reaction of 1-alkoxypolyfiuoroalkyl sulfonates with lithium tetraalkyl alumin ates yields stereospecifically alkylated products with a high degree of inversion. However, the reaction with trialkylaluminium reagents is considerably less stereospecific. 

In this reaction, acetals are used as dication equivalent of one-carbon unit 72, whereas 71 provides a dianion 73 <95TL5581>. A new stereocontrolled synthesis of substituted tetrahydrofiirans starts with dioxalones 74. A titanium-mediated methylenation using dimethyltitanocene (THF, 60 C) with subsequent treatment of 75 with trialkylaluminium reagents results in the formation of tetrahydrofiirans 76 <95JA6394>. 

Other useful organometallic reagents for the preparation of tertiary stibines or related heterocyclic compounds are compounds of lithium, aluminum, tin, copper, zirconium, and other metals.In most cases, these metal compounds are reacted with antimony chlorides or bromides. Good yields of tertiary stibines were, however, also obtained by the interaction (equation 3) of trialkylaluminium reagents and tris(dimethylamino)stibine. ... 

Reactions.—Mono-A -alkylation of simple amides can be achieved by treatment of the corresponding amide methylols with trialkylaluminium reagents. Dipole-stabilized carbanions (166) can be formed from AW-dimethylbenzamides by treatment with s-butyl-lithium these react normally with a range of electrophiles leading to analogues of the N-methyl group. ° The little-studied A -ynamides (167) are accessible from secondary amides by sequential reaction with phosgene, a nucleophile, and potassium t-butoxide. ... 

Palais L, Boumaud C, Micouin L, Alexalds A (2010) Copper-catalysed ring opening of polycyclic meso-hydrazines with trialkylaluminium reagents and SimplePhos ligands. Chem... 

A wide range of acyclic trisubstituted enones readily undergo ECA with both commercially available trialkylaluminium reagents and the in situ-generated aryl (dialkyl)aluminium reagents. Very low catalyst loadings are sufficient (0.5-3.0 mol %) and products are formed in good yields (33-95%) and exceptional enantio-selectivities (80 to 99%) (Scheme 28) [65]. 

Textile clothing static charges, 394 Theory without detailed thought, 394 Thermal explosions, 394 Thermal stability of reaction mixtures and systems, 394 Thermite reactions, 395 Thermochemistry and exothermic decomposition, 396 Thiatriazoles, 400 Thionoesters, 401 Thiophenoxides, 401 Thorium furnace residues, 401 Tollens reagent, 401 Toxic hazards, 402 Trialkylaluminiums, 402 Trialkylantimony halides, 403 Trialkylbismuths, 403... 

The use of a trialkylaluminium-alkylidene iodide mixture to effect cyclopropanation has been re-examined. The reaction was found to work well when conducted in CH2CI2, and shows contrasting regioselectivity to the Simmons-Smith reagent in reaction with geraniol (Scheme 2). 

The polymerization of 1,3-butadiene is catalysed by butyllithium (p. 48). Oligomerization of ethene is effected by trialkylaluminiums (p. 80). Grignard reagents, however, do not normally add to alkenes or alkynes. 

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