Green synthesis

Heteroacyclic and Heterocyclic containing drugs showed remarkable and noticeable drug absorption, transmission and drug effects; hence they created their own identity and importance in pharmaceutical, medicinal, agricultural and drug sciences. Benzonido and pyridino, dithiazolo, quinolino and alkylamino heterocycles showed important applications in industrial, pharmaceutical, medicinal and drug chemistry.  Considering all these facts into consideration recently in this laboratory interaction of N-(7-chloroquinoline-4-yl)-N,N-diethyl-pentane-1,4-diamine (1) was carried out with thiourea (2) in ethanol medium to isolate N-(7-thiocarbamidoquinoline-4-yl)-N,N-diethyl-pentane-1,4-diamines (3). N-(7-thiocarbamido quinoline-4-yl)-N,N-diethyl-pentane-1,4-diamines on further interactions with various isothiocynates (4) in acetone-ethanol medium produces N-[7-(1- substituted) -2,4-dithiobiureto)-4-yl]-N,N-diethyl-pentane-1,4-diamine (5) which were successfully  oxidatively cyclised into N-[7-(5-substitutedimino-3-amino)-1,2,4-dithiazo-4-yl]-N,N-diethyl-pentane-1,4-diamine (6) these reactions are hither to unknown. The justification and identification of the structure of these newly synthesized compounds had been established on the basis of chemical characterization, elemental analysis and through spectral data.

A pestle and mortar-assisted solvent-free condensation of salicylaldehyde and 2-aminopyridine efficiently afforded a NO donor Schiff base ligand in high yield. This is an environmentally benign method, as satisfactory results were obtained in solvent free conditions with excellent yields, short reaction time, and operational simplicity in the experimental procedure. Copper(II) complex of this ligand were synthesized. Schiff base ligand and its complex were characterized by their melting point, elemental analysis, IR and 1H NMR spectra. In addition, DNA-binding properties of the metal complex were investigated using absorption spectroscopy, viscosity measurements and thermal denaturation methods. The DNA photoclevage experiment shows that, the complex act as effective DNA cleavage agent.