Generation of functionalized aryl and heteroaryl aluminum reagents by halogen–lithium exchange

Various functionalized aryl and heteroaryl aluminum reagents were obtained by performing I–Li or Br–Li exchange reactions with the corresponding unsaturated organic halides in the presence of i-Bu2AlCl. By means of an appropriate catalyst, the resulting new aluminum species were directly acylated, allylated or arylated. 1,4-Michael additions to enones have also been achieved.