Cyclometallierungsreaktionen an o-Hydroxy-diarylazoverbindungen

Cyclometallation reactions of o-Hydroxy-diarylazocompounds The metallation of o-hydroxy-diarylazoligands with Pt(II)- or Pd (II)-salts leads not only to the classical complexes of type 3 but also to coordination compounds of type 2 , containing a metal-carbon bond. The latter coordinate carbon monoxide, which can be inserted into the metal-carbon bond, thus leading after reductive elemination of the metal to heterocyclic products.