Table 2 Scope of the Suzuki coupling reaction catalyzed by RHP-Si-NH2-Pd(0).

From: Sustainable and recyclable heterogenous palladium catalysts from rice husk-derived biosilicates for Suzuki-Miyaura cross-couplings, aerobic oxidations and stereoselective cascade carbocyclizations

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Entrya

Ar1-X

Ar2-B(OH)2

Product 3

Yield (%)b

1

1a

3a

98

2

1b

3a

85

3

1a

3b

95

4

1a

3c

99

5

1b

3c

92

6

1c

3d

98

7

1a

3e

94

8

1a

3f

88

9

1d

3g

99

10

1c

3h

99

  1. [a]Reaction conditions: RHP-Si-NH2-Pd(0) (1.6 mg, 0.25 mol%), aryl iodine 1 (1.0 mmol, 1.0 equiv.), arylboronic acid 2 (1.2 mmol, 1.2 equiv.), K2CO3 (414.6 mg, 3.0 mmol, 3.0 equiv.), H2O:EtOH (1:1, 3 mL), 70 °C, 1 h. [b]Yield of purified product 3 after silica chromatography.
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