Formation of Indanone from an Iridanaphthalene Complex

The
first example of evolution of an iridanaphthalene into an indanone
through an intermediate indenyl is reported, serving as a good example
of starting material to obtain indanones. Two new iridanaphthalenes
are obtained by intramolecular C–H activation of a phenyl ring
of a carbene ligand in [IrCp*­{C­(OMe)­CHCPh2}­(L)]­PF6 (L = PPh2Me, PMe3) complexes.
It is demonstrated that these iridanaphthalene complexes can undergo
a thermal reaction to give indenyl complexes and 3-phenylindanone.

本研究首次报道了铱萘络合物(iridanaphthalene)经由茚基(indenyl)中间体转化为茚酮(indanone)的首例反应实例，该反应可作为制备茚酮类化合物的优质起始范例。通过对配合物[IrCp*{=C(OMe)CH=CPh2}(L)]PF6（其中L为PPh2Me、PMe3）中的卡宾配体(carbene ligand)的苯环进行分子内C–H活化反应，得到了两种新型铱萘络合物。实验证实，此类铱萘络合物可通过热反应生成茚基络合物与3-苯基茚酮。