Bi Bi Fatemeh Mirjalili - Department of Chemistry, College of Science, Yazd University, Yazd, P. O. Box: ۸۹۱۹۵-۷۴۱,I. R. Iran
Fateme Hakimi Saryazdi - Department of chemistry, Faculty of science, Payame noor University, Tehran, Iran

Nano-sawdust/Sn(IV) was used as a readily available, inexpensive, biodegradable and environmentally benign heterogeneous solid acid biocatalyst for the one pot cascade synthesis of highly functionalized dihydro-۲-oxypyrroles. Four-component reactions (۴CRs) of the dialkylacetylenedicarboxylates, amines and aldehydes were used for the synthesis of highly functionalized dihydro-۲-oxypyrroles under thermal conditions.

Nano-sawdust/Sn(IV), Dihydro-۲-oxopyrrole, Multicomponent reaction, Solid acid nano-atalyst