
Photochemistry, a sub discipline of chemistry is the study of interactions between light and atoms or molecules. Photochemistry describes chemical reactions that proceed with the absorption of light. Everyday examples include photosynthesis, the degradation of plastics and the formation of vitamin D with sunlight. Photochemical reaction of thioamide derivatives gave the cyclised, oxidized and dehalogenated compounds. Thioamide derivatives are well known for their antimicrobial activities and they have drawn much attention because of their novel heterocyclic chemistry. Light is clearly manifesting itself as a unique reagent in organic synthesis as many of the novel reactions involve photochemical reaction as a key step. The synthesized thioamides are characterized by IR, 1H, 13C, Mass and analytical spectral data.