Fig. 18

The plausible mechanism for the synthesis of tetrahydrobenzo[b]pyran derivatives catalyzed with Zr-MOF-glutaraldehyde-Adn@Fe3O4 system.

The plausible mechanism for the synthesis of tetrahydrobenzo[b]pyran derivatives catalyzed with Zr-MOF-glutaraldehyde-Adn@Fe3O4 system.