Journal of Catalysts / 2013 / Article / Tab 6

Research Article

Microwave-Assisted Synthesis of Spirofused Heterocycles Using Decatungstodivanadogermanic Heteropoly Acid as a Novel and Reusable Heterogeneous Catalyst under Solvent-Free Conditions

Table 6

Comparison of the results of the present work with those of the earlier works.

CatalystConditionsYield (%)Time Reference

NBS/AIBNSolvent-free/80°C72–744 h[6]
AlCl3Ethanol/Reflux82–845 h[7]
H6GeW10V2O40·22H2OMWI/Solvent free87–906-7 minThis work