Table 4 Screening of base.

From: Pd immobilization biguanidine modified Zr-UiO-66 MOF as a reusable heterogeneous catalyst in Suzuki–Miyaura coupling

Entry

Base

Time (Min)

Yield (%)

1

K2CO3

20

96

2

Et3N

60

60

3

Na2CO3

60

70

4

No base

120

Trace

  1. Reaction conditions: 4-methylbromobenzene (1.0 mmol), phenylboronic acid (1.0 mmol), UiO-66-biguanidine/Pd, EtOH/H2O (1:1) as solvent (3 mL) at 50 °C; Isolated yield.
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