Organoaluminum compounds aliphatic

The presence of jr-electron-donating substituents at the 2-position of the vinyl portion of the ether allows for significant acceleration of the Claisen rearrangement.314-318 Aliphatic Claisen rearrangements can proceed in the presence of organoaluminum compounds,286-319-320 although other Lewis acids have failed to show reactivity.286,321 324 Useful levels of (Z)-stereoselection and asymmetric induction have been obtained by use of bulky chiral organoaluminum Lewis acids.325 327... 

Since alkali aluminum hydrides with alkenes give alkali aluminum tetraalkyls (alkali tetraalkyl alanates) (291, 293), a further simple route to aliphatic organoaluminum compounds is opened up ... 

Preparation of Aliphatic Organoaluminum Compounds from Compounds of Other Elements... 

Very recently, a route has been worked out for the aryl series which links up with the Direct Synthesis of aliphatic organoaluminum compounds. Sodium tetraethylalanate and benzene react at over 150°C in a sort of exchange reaction to give sodium tetraphenylalanate and ethane ... 

Organoaluminum compounds featuring simple c-bonded aliphatic or aryl substituents [21, 22]. By virtue of the polarity in the metal-carbon bond, these groups render the metal highly reactive to both moisture and oxygen and discussion will focus on the synthetic procedures and precautions necessary to prevent decomposition as well as on the ability to harness insertion reactions for benefit. Focus will then shift to the effects of introducing Lewis base and the observation of 4- and 5-coordinate complexes. 

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