KHODAEI ET AL.
9 of 10
hydrazine hydrate (1 mmol) was added to the reaction mix-
ture and stirred at 80 °C for 28 hr. The resulting nanoparti-
cles were filtered, washed with ethanol and dried at room
temperature. In order to prepare complex functionalized
boehmite, the above mentioned solid (1 g) was refluxed
with isatin (1 mmol) in ethanol for 8 hr. The resulting solid
(complex‐boehmite) was separated using filtration, washed
with ethanol and dried at room temperature. Finally, for
the preparation of Cu immobilized on complex functional-
ized boehmite, the complex‐boehmite (1 g) was dispersed in
ethanol and mixed with 1.0 mmol of Cu (NO3)2.3H2O. The
mixture was stirred at 80 °C for 10 hr and the solid catalyst
(Cu‐complex‐boehmite) was obtained after washing with
ethanol and drying at 50 °C.
solid catalyst used for the oxidation of sulfides and thiols
under solvent‐free conditions at room temperature. This
method offers several advantages including short reaction
times, good to excellent product yields, simple work‐up as
well as the ability to tolerate a wide variety of substituents
in the substrates. Cu‐complex‐boehmite catalyst is recov-
erable and reusable catalyst.
ACKNOWLEDGEMENTS
We thank the Razi University for generous financial sup-
port of this work.
ORCID
Mohammad Mehdi Khodaei
3.3 | General procedure for oxidation of
sulfides
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In a 25 ml round button flask, sulfide (1 mmol), Cu‐com-
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was monitored by TLC. After completion of the reaction,
the catalyst was separated by simple filtration and the prod-
uct was extracted with CH2Cl2 (3 × 15 ml) and dried over
anhydrous MgSO4. Finally, sulfoxide was obtained as the
only product in a very high isolated yield.
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