Solar Light Photo-Catalyzed Condensation of Aldones With 4-Phenylthiosemicarbazide, A Green Chemistry Approach

A significant photo-activating effect was evidenced upon investigating the condensation of aldehydes and ketones with 4-phenylthiosemicarbazide in the absence of any type of catalyst (either acido-basic or nucleophilic catalysis). actual yields were not found superior to those obtained using nucleophilic catalysts; however, the reaction can be run at room temperature with the absence of an additional solvent. a positive hydrophobic effect was also noted. furthermore, it was found that, the described photo-chemical method did not require an expensive and energyconsuming photo-chemical equipment since the whole process was carried out using natural solar light in regular laboratory glass ware.