%0 Journal Article %T Zn2SnO4 nanostructure as an efficient catalyst for the preparation of pyrano[3,2-c]chromene and pyrano[4,3-b]pyran derivatives under ultrasonic irradiation conditions %J Journal of Particle Science and Technology %I Iranian Research Organization for Science and Technology %Z 2423-4087 %A Nemat-Bakhsh, Nabi %A Ghashang, Majid %D 2019 %\ 06/30/2019 %V 5 %N 1 %P 61-69 %! Zn2SnO4 nanostructure as an efficient catalyst for the preparation of pyrano[3,2-c]chromene and pyrano[4,3-b]pyran derivatives under ultrasonic irradiation conditions %K Zn2SnO4 nanoparticles %K pyran derivatives %K Multicomponent reaction %K pyrano[3 %K 2-c]chromene %R 10.22104/jpst.2019.831 %X We plan to study the synthesis of Zn2SnO4 nanoparticles via a sol-gel method and evaluate their catalytic activity in the three-component reaction including active enolates, active methylene, and aldehydes leading to the formation of the pyran derivatives. Functionalized pyrano[3,2-c]chromenes and pyrano[4,3-b]pyran derivatives were synthesized via a one-pot, a three-component reaction under ultrasonic irradiation conditions in good to excellent yields. The catalyst was characterized by XRD, FESEM and TEM analyses. %U https://jpst.irost.ir/article_831_b7a209761d85505f3615b1ab556abcf8.pdf