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Table 3 Effect of temperature in toluene solvent

From: Zirconia-based catalyst for the one-pot synthesis of coumarin through Pechmann reaction

Entry Reactant Catalyst Temperature (°C) %Yield Time (min.)
1 Resarcinol + ethylacetoacetate ZrO2-TiO2 100 95 20
2 Resarcinol + ethylacetoacetate ZrO2-TiO2 80 95 35
3 Resarcinol + ethylacetoacetate ZrO2-TiO2 60 95 110
4 Resarcinol + ethylacetoacetate ZrO2-TiO2 45 83 130
5 Resarcinol + ethylacetoacetate ZrO2-ZnO 100 70 30
6 Resarcinol + ethylacetoacetate ZrO2-ZnO 80 63 50
7 Resarcinol + ethylacetoacetate ZrO2-ZnO 60 55 140
8 Resarcinol + ethylacetoacetate ZrO2-ZnO 45 40 170
9 Resarcinol + ethylacetoacetate Without catalyst 80 N.R. 240
  1. N.R. no reaction