Fig. 3
Proposed mechanism for the synthesis of indenopyrido[2,3-d]pyrimidines in the presence of Fe3O4@SiO2-SnCl4
Fig. 3 | BMC Chemistry
Proposed mechanism for the synthesis of indenopyrido[2,3-d]pyrimidines in the presence of Fe3O4@SiO2-SnCl4