Alum Catalyzed Simple, Efficient, and Green Synthesis of 2-[3-Amino-5-methyl-5-(pyridin-3-yl)-1,5-dihydro-4H-1,2,4-triazol-4-yl]propanoic Acid Derivatives in Aqueous Media

Table 3

Effect of various catalysts on the formation of 5a at 80°C.

Entry	Catalyst	Time (hrs)	Yield (%)
1	SiO2	15	40
2	Al2O3	10	63
3	P2O5	8	75
4	Alum	6	90