Abstract
This chapter provides an overview on recent selected advances for the application of organic photocatalysts in synthesis. Organic photocatalysts have been involved in quite a number of multicatalytic processes. Structures of organic photocatalysts are dominated by aromatic scaffolds providing extended conjugated systems as a prerequisite for their light absorption in the visible range. The chapter summarizes a few recent developments in visible light photocatalysis with organic dyes, which have recently contributed to substantially broaden the scope of possible applications. Since the early beginnings in using organic photocatalysts some decades ago the synthetic community's recent surge of interest for sustainable methods has also triggered considerable progress in the field of metal-free visible light photocatalysis. The chapter outlines three common modes of activation, namely, energy transfer, electron transfer, and atom transfer. A protocol for decarboxylative fluorination uses selectfluor to trap the stabilized radicals by fluor atom transfer.
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