Alanes organo

Cp2ZrH(Cl) = ([Zr]-H) reacts with unsaturated C—C bonds to give isolable addition products (in opposition to boranes and alanes, organo-Zr are rather stable in dry air) that can be hydrolyzed with diluted acidic solutions. The scope of hydrozirconation with respect to chemoselectivity and substrate structure lies between those of hydroalumination and hydroboration. The facile isomerization of secondary alkylzirconium derivatives into primary alkyl derivatives occurs very readily (even below room temperature, note the difference with A1 and B ). 

In a similar fashion, the redistribution of alkyl groups between organo-alanes and organoboranes proceeds via an alkyl-bridged boron-aluminum species ... 

A further possibility for the conversion of alkali metal alanates into organo-aluminum compounds is the reaction with heptafluoropropyl iodide, from which perfluoropropylalanates are obtained (93). 

Alane s. a. Triethylamine alane Alanes (s. a. Aluminum compds., organo-)... 

C-Addition to carbon-carbon double bonds CC U CC Addition-halogenation 16 576 Adenosine triphosphate as reactant 18 151 Adipic acid as reagent 18 232 Adiponitrile as reagent 17 577 20 302 Air s. Oxygen Alanes (s. a. Aluminum compounds, organo-)... 

The coupling of alkynyl metals with tertiary alkyl halides without the occurrence of elimination or other side-reactions has been achieved with the organo-alanes, which are prepared from the alkynyl-lithium by reaction with anhydrous AlCl3. Thus, reaction of (Bu C3C— )3A1 with 1-bromoadamantane gave (735 96%) two of the three acetylene units are not utilized and can be recovered nearly quantitatively. It appears that starting material savings caimot be made by using alkynyldialkylalanes since elimination processes tend to occur with t-alkyl halides. The reaction mechanism is not clear. 

Air s. Oxygen Alanes s. Aluminum compounds, organo-Alcohols... 

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