Table 2 Synthesis of polyhydroquinoline derivatives using UiO-66-Pyca-Ce (III) as a catalysta.

From: Fabrication and characterization of a novel catalyst based on modified zirconium metal-organic-framework for synthesis of polyhydroquinolines

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Entry

Product

R1

Time

(min)

Yieldb

(%)

Melting point (℃)

Observe

Ref

5a

7

92

235–238

55

5b

7

94

172–174

56

5c

10

90

223–225

55

5d

12

89

254–256

56

5e

8

90

199–200

57

5f.

6

96

249–252

56

  1. aReaction conditions: (1) Substituted aldehyde (1 mmol), (2) ethyl acetoacetate (1 mmol), (3) dimedone (1 mmol), (4) ammonium acetate (2 mmol), UiO-66-Pyca-Ce (III) (0.01 g), ambient temperature; bIsolated yield.
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