Correction to: Res Chem Intermed (2017) 43:2299–2314 https://doi.org/10.1007/s11164-016-2762-x

In the original publication of the article, the graphical abstract was incorrectly published. The correct graphical abstract should be as given below.

Graphical abstract A green reusable nanomagnetic catalyst supported with functionalized piperidinium benzene-1,3-disulfonate silica as a novel and efficient catalyst was used for the synthesis of 9-aryl-9H-2,4,5,7-tetramethyl-diuracilopyrans as well as 9-aryl-3,4,6,7-tetrahydro-2H-pyran-1,8(5H,9H)-diones.

figure a