Research Article

Efficient Knoevenagel Condensation Reactions Catalyzed by Activated Gel Zirconium(IV) Oxide

Table 2

Effect of concentrations of catalyst.

EntryZrOCl2·8H2O (mol %)Yield ( % ) a

1535
21065
31588
42088

Reaction conditions: 1a (1 mmol), 2 (1 mmol), ZrOCl2·8H2O/NaNH2 (15 mol %), in THF (5 mL) at 25°C.
a I solated yields.