The Chapman approach has been applied in a variety of ways since its original report, varying substrates, oxidants, and other aspects (and so synthesis of carpanone has subsequently been achieved by "quite a few research groups"); the actual mechanism of Pd(II) action is likely more complex than the original conjecture, and there is evidence that the mechanism, broadly speaking, depends on actual conditions (specific substrate, oxidant, etc.). Various groups,  including the laboratories of Steve Ley, Craig Lindley, and Matthew Shair, have succeeded in extending the Chapman method to solid-supported synthesis, i.e., phenolic starting materials on polymeric supports, thus allowing the generation of libraries of carpanone analogs. A hetero-8-8' oxidative coupling system akin to the Chapman approach has been developed that uses IPh(OAC), and that allows for preparation of more electron rich homodimers, and for hetero-tetracyclic analogs of carpanone.