Beilstein J. Org. Chem.2020,16, 415–444, doi:10.3762/bjoc.16.40
-free ATRP strategy [132][133][134][135][136][137]. Latter reference provided a comprehensive overview demonstrating the function of phenothiazine derivatives, perylene, diaryl dihydrophenazines, anthracene or pyrene. In addition, type II photoinitiators including benzophenone, and thioxanthones were
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Graphical Abstract
Scheme 1:
Structural patterns of several symmetric cyanines relating to trimethines (I), pentamethines (II), ...
Beilstein J. Org. Chem.2015,11, 431–436, doi:10.3762/bjoc.11.49
/bjoc.11.49 Abstract Thioxanthones – being readily available in one step from thiosalicylic acid and arenes – were used in ruthenium-catalyzed C–H-activation reaction to produce 1-mono- or 1,8-disubstituted thioxanthones in good to excellent yields. Scope and limitation of this reaction are presented
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Keywords: C–H activation; metal catalysis; thioxanthones; Introduction
Thioxanthones (Figure 1) belong as a unique member to the large group of benzoannelated heterocycles [1]. They have found extensive use in biomedical applications (drugs and other bioactive compounds [2][3][4][5]) and material sciences
reactions for thioxanthones, such as C–C-bond formations [11][12], are underdeveloped [13]. For example, there are only a handful of 1,8-dialkyl/aryl-functionalized thioxanthones known [14][15][16], while more than 500 1-substituted thioxanthones are reported according to Scifinder. In contrast, xanthone