A polystyrene-supported palladium (II) 1-phenyl-1, 2-propanedione-2-oxime thiosemi- carbazone (PPDOT) complex is found to be a highly active catalyst for the Sonogashira coupling reactions of aryl halides with terminal alkynes. The reactions can be performed under copper-and solvent-free conditions in an air atmosphere. The palladium catalyst is easily separated, and can be reused for several times without a significant loss in its ...
![Hydrazinecarbothioamide,2-[2-(hydroxyimino)-1-phenylpropylidene]- Structure](https://image.chemsrc.com/caspic/471/6292-80-4.png)