Introduction of a novel nanosized N-sulfonated Brönsted acidic catalyst for the promotion of the synthesis of polyhydroquinoline derivatives via Hantzsch condensation under solvent-free conditions

In this research NS-C₄(DABCO-SO₃H)₂)·4Cl as a new nano sized N-sulfonic acid was prepared and characterized using different types of methods including FT-IR, ¹H NMR, ¹³C NMR, mass, XRD, TGA, SEM and AFM analysis.

Melamine trisulfonic acid (MTSA): an efficient and recyclable heterogeneous catalyst in green organic synthesis

Melamine trisulfonic acid (MTSA) as a highly efficient heterogeneous solid acid catalyst catalyzes various organic transformations.