Table 4.

Recyclability and reusability studies of [(VO)TPP][(TCM)₄] in the typical reaction.^a

Experimental round	Fresh	1	2	3	4	5	6
Yield (%)b	85	84	82	79	76	74	70

^aReaction conditions: 3,4-dimethoxybenzaldehyde (1 mmol; 0.166 g), 3-amino-1,2,4-triazole (1 mmol; 0.084 g, 0.014 mL), malononitrile (1 mmol; 0.066 g); ^bIsolated yield.