Shuntaro Mataka

Reaction of η 6 −Dihydronaphthalene−Cr(CO) 3 and η 6 -Indene-Cr(CO) 3 Complexes with Iodoarenes Under Pd-Catalysis

η6-Dihydronaphthalene tricarbonylchromium(0) complexes and η6-indene tricarbonylchromium(0) have been prepared and subjected to Pd(0) catalysed reactions with iodoarenes. The reaction of η6-dihydronaphthalene tricarbonylchromium(0) complexes with iodoarenes under Jeffery conditions leads after decomplexation to triarylated products. The stereo- and regiochemistry of these products could be affirmed by an X-ray crystal structure. The η6-dihydronaphthalene unit can be part of more complicated structures such as of estrone derived compounds without changing the course of the reaction. The reaction of η6-indene tricarbonylchromium(0) with iodoarenes, however, leads to benzophenones, where the indene unit is not incorporated.

Preparation of 1,2-Diaminopyrene via a 1,2,5-Thiadiazole Route

In our search for a light-emitting material suitable for an elcctroluminescent display2.6), our attention was directed to pyrene <brivatives, as pyrene is strongly fluorescent. I,2-Diaminopyrene is a useful starting compound for heterocyc1e-annelated pyrenes, which are expected to exhibit <bcper-colorcd fluorescence than pyrene itself. Recently, the authors have <bvelopcd a preparative method for aromatic vicinal diamines by reduction of 1,2,5-thiadiazolo aromatics.•)