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Catalytic Versatility of Novel Sulfonamide Functionalized Magnetic Composites
The present work describes two novel
magnetic composite catalysts, synthesized by functionalizing the silica/iron
oxide composite surface with sulfaguanidine and sulfadiazine. The
sulfaguanidine functionalized catalyst was found to be very efficient
for multicomponent coupling reactions of phenylacetylene with various
aldehydes and amines. The sulfadiazine functionalized catalyst was
successfully applied in the synthesis of various 1,8-dioxo-octahydroxanthenes
in water. Both the sulfaguanidine and sulfadiazine functionalized
catalysts were very active and selective in the alkylation of toluene
with benzyl chloride