MIL-101-SO3H metal–organic framework as a Brønsted acid catalyst in Hantzsch reaction: an efficient and sustainable methodology for one-pot synthesis of 1,4-dihydropyridine

A straightforward and efficient methodology for the synthesis of the medicinally important 1,4-dihydropyridines has been demonstrated using MIL-101-SO₃H metal–organic framework as a sustainable Brønsted acid catalyst.

Diethyl 2,6-dimethyl-4-(naphthalen-1-yl)-1,4-dihydropyridine-3,5-dicarboxylate

In the title compound, C23H25NO4, the 1,4-dihydropyridine ring adopts a flattened boat conformation. The naphthalene ring system forms a dihedral angle of 88.59 (6)° with the pyridine ring. In the crystal, N—H...O and C—H...O hydrogen bonds generate anR12(6) ring motif and result in a zigzag chain along thebaxis. Additional C—H...O hydrogen bonds form infinite chains along thec-axis direction.

One-pot synthesis of Hantzsch dihydropyridines using a highly efficient and stable PdRuNi@GO catalyst

The method for the synthesis of 1,4-dihydropyridine compounds in the presence of Pd–Ni–Ru@GO was developed, which is simple, effective and productive.