Pd(II) Schiff base-functionalized magnetic Fe3O4 nanoparticles
Table 3. Heck reaction of aryl halides and styrene catalysed by Fe3O4@[(EtO)3Si–L1H]/Pd(II)a
Entry
R
X
Time
(h)
Yield
(%)b
M.p. (°C)
Found
Reported
1
2
3
4
5
6
H
I
2
3
5
7
4
5
98
96
96
92
95
90
122–124
122–124
134–136
134–136
118–120
118–120
121–123 [39]
121–123 [39]
135–137 [39]
135–137 [39]
117–119 [40]
117–119 [40]
H
Br
I
4-CH3O
4-CH3O
4-CH3
4-CH3
Br
I
Br
aReaction conditions: aryl halide (1 mmol), styrene (1.5 mmol), Fe3O4@[(EtO)3Si–L1 H]/Pd(II) (5 mg = 0.0021 mmol Pd), Et3N (2 mmol), DMF (3 ml).
bIsolated yield.
conditions according to our previous report,[38] the scope and gen-
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[(EtO)3Si–L1H] as organic shell via a co-precipitation method. A Pd
(II) Schiff base complex has been immobilized on the MNPs through
a surface modification of Fe3O4 with a Schiff base ligand. The cata-
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separation and drying without significant catalytic deactivation
which typically happens due to the leaching of active species or
degradation of the structure. The Pd complex is a good heteroge-
neous catalyst for Suzuki cross-coupling reaction of various aryl ha-
lides (I, Br, Cl) with phenylboronic acid and Heck coupling reaction
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Acknowledgements
We are grateful to the Bu-Ali Sina University and Payame Noor Uni-
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Appl. Organometal. Chem. (2016)
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