682356-28-1Relevant articles and documents
Synthesis of dibenzofuran-1,4-diones using the D?tz benzannulation
Anderson, James C.,Denton, Ross M.,Hickin, H. Gwen,Wilson, Claire
, p. 2327 - 2335 (2007/10/03)
The chromium Fischer carbene complexes of benzofuran and benzothiophene have been prepared and can be used in D?tz benzannulations with alkynes for the regioselective and converg ent synthesis of dibenzofuran-1,4-dione heterocycles. The use of alkynylboronates led to model systems of the tricyclic ring system of popolohuanone E after oxidation. It would appear that the combination of alkynyl boronates with furan type Fischer carbene complexes leads to substantial amounts (~50%) of protodeboronated products.