4,4 -Di-t-butyl-2,2 -bipyridine

Key 8Q, 8-quinolinate acac. acetylacetonate PA, picolinate DTBC, 3,5-di-t-butyl-catecholate TDT, 3,4-toluene-dithiolate bpy, 2,2-bipyridine. ... 

A class of iridium(I) complex (30) possessing 2,2 -bipyridine (bpy) or 4,4 -di-fe/t-butyl-2,2 -bipyridine (dtbpy) ligands exhibits excellent activity and selectivity for aromatic C-H borylation with Bzpinj [59] or HBpin [60], An Ir catalyst prepared from %[IrCl(COD)2l2 (COD = 1,5-cyclooctadiene) and dtbpy achieves a maximum turnover number (8000) with 0.02 mol% catalyst loading at 100 °C. The reaction was first demonstrated at 80-100 °C using an Ir-Cl complex, but was foimd to proceed smoothly even at room temperature when the catalyst is prepared from... 

Figure 7.9 X-ray crystal structure of [W(T -C )2(CO)2(dbcbipy)] (dbcbipy = 4,4 -di(butyl carboxyl)-2,2 -bipyridine) [87. ...

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