Comparing neutral (monometallic) and anionic (bimetallic) aluminium complexes in hydroboration catalysis: influences of lithium cooperation and ligand set

Victoria A. Pollard, M. Àngeles Fuentes, Alan R. Kennedy, Ross McLellan, Robert E. Mulvey

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Bimetallic lithium aluminates and neutral aluminum counterparts are compared as catalysts in hydroboration reactions with aldehydes, ketones, imines and alkynes. Possessing Li–Al cooperativity, ate catalysts are found to be generally superior. Catalytic activity is also influenced by the ligand set, alkyl and/or amido. Devoid of an Al−H bond, iBu2Al(TMP) operates as a masked hydride reducing benzophenone through a β‐Η transfer process. This catalyst library therefore provides an entry point into the future design of Al catalysts targeting substrate specific transformations.
Original languageEnglish
Number of pages6
JournalAngewandte Chemie International Edition
Early online date15 Jun 2018
Publication statusE-pub ahead of print - 15 Jun 2018


  • bimetallic lithium aluminates
  • neutral aluminium
  • hydroboration reactions
  • catalyst activity

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