Preparation of 2,5‐disubstituted pyrimidines from vinamidinium salts and synthesis of novel disulfane derivatives

Synthesis of new allylidene amino phenol-containing Schiff bases and metal complex formation using trimethinium salts

An efficient route for the synthesis of novel Schiff bases from the condensation reaction of 2-substituted 1,3-bis(dimethylamino)-trimethinium salts with diverse aminophenols in the presence of triethylamine in EtOH at reflux is described. Complexes of transition metals with Schiff base ligand (L) 3c, having the donor atom set N₂O₂, were studied. The ultraviolet spectral behavior of the complexes in DMSO was investigated and the λ_max of these compounds was examined. The structure of the new compounds was confirmed based on their spectral data from IR, ¹H NMR and ¹³C NMR, mass spectra, and elemental analysis.

An efficient route for the synthesis of novel Schiff bases from the condensation reaction of 2-substituted 1,3-bis(dimethylamino)-trimethinium salts with diverse aminophenols in the presence of triethylamine in EtOH at reflux is described.

A facile and efficient route to one-pot synthesis of new cyclophanes using vinamidinium salts

In this study, an efficient method for the synthesis of new cyclophanes (5a-f, 6a-g) through the condensation of 1,4-phenylenedimethanamine (3) or 2,3,5,6-tetramethylbenzene-1,4-diamine (4) with 2-substituted vinamidiniums (2a-g) is described. The cyclophane derivatives are obtained in good to excellent yields in the presence of acetic acid in refluxing acetonitrile after 15 h. The structure of new compounds was validated based on their spectral data (1H NMR, 13C NMR, IR) and elemental analysis.