Table 2 Screening of the substrate scope.

From: Efficient synthesis of novel phenanthroline-dimedone derivatives using Pd@HQBI-SPION as a versatile palladium-immobilized catalyst

Entry

Benzyl bromides

Products

Timea (h)

Yieldsb (%)

1

12

94 ± 3

2

14

83 ± 3

3

16

79 ± 1

4

12

87 ± 2

5

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12

79 ± 4

6

12

90 ± 2

7

16

77 ± 3

8

16

75 ± 2

  1. Reaction conditions: 1(2 mmol), 2a(2 mmol), dimedone 4(2.2 mmol, 1.1 eq.), MaCN (4 mL), Pd@HQBI-SPION (0.1 mol%), under reflux conditions.
  2. a Time of step 1. Time of step 2 = 8 h.
  3. b the yields are reported are isolated yields of the products after three replicates and are reported as the mean ± standard deviation.
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