Thus, the synthesis is easily scalable at low cost. Target materials 9,9-dimethyl-10-( phenothiazine (PTZ-TPI) were obtained via Buchwald-Hartwig animation of TPI-Br with either dimethylacridan (DMAC), phenoxazine (PXZ), or phenothiazine (PTZ), respectively. All the target materials were obtained in relatively high yields. The identity and purity of the compounds were confirmed by 1 H and 13 C NMR spectroscopy, high-resolution mass spectrometry, melting point determination and elemental analysis. Single crystals suitable for X-ray diffraction of TPI were obtained by diffusion of acetone into a dichloromethane solution of TPI (Figure ). The structure of TPI is similar to the version that has been determined previously, despite a higher-symmetry space group and resulting symmetry-induced disorder in the structure. The symmetry-related phenyl groups on C2 and C4 adopt a shallow inclination relative to the plane of the imidazole (interplanar angle 25.51°), while those on N1 and C5 are closer to orthogonal (72.56° between planes. Differences in the relative interplanar angles lead to differences in packing; all molecules packing with the imidazole plane lying parallel to the (1 0 1) plane, in contrast to the known structures where half of the molecules are oriented parallel to (1 0 1) and half parallel to (0 1 1).