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Photochemistry

Green Photoredox Catalysis Using Near-Infrared Light: Two-Photon-Absorption Enabled Cyclization

Over the past two decades, there has been a significant surge of interest in the field of ultraviolet and/or visible (UV/vis) light photocatalysis. UV-vis irradiation merged with noble metal-based photosensitizers of Ru, Ir as catalysts is most useful combination in this segment as these metal photocatalysts mostly absorb in the UV/vis region. However, high energy UV/vis irradiation sources as well as the noble-metal based photosensitizer are not considered as green.

Photoinduced Synthesis of 4H-Benzo[E]Pyrazolo[1,5-B][1,2,4]Thiadiazine Derivatives by Intramolecular C-N Coupling

Sulfonamides represent an important family of compounds with diverse biological activities, especially recognized as antibiotics. 1,2,4-Benzothiadicines-1,1-dioxide belong to a family of cyclic sulfonamides with significant pharmacological applications, such as antimicrobial, antiviral and antidiabetic. In addition, they are used clinically as diuretics and antihypertensives.

Developing a Greener Approach for the Synthesis of Anticancer Drug Candidate

The use of light energy, which is considered a clean and traceless reagent, for the synthesis of complex heterocyclic molecules makes organic photochemistry one of the important green chemistry tools. Photochemistry holds an important role in accessing biologically relevant molecules containing complex skeletons that are difficult to access by conventional thermal methods. Skeletons that are difficult to obtain through ground state chemistry, can be constructed using light as a reagent, producing high energy excited states required for the molecules to undergo required transformation.

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