HAuCl4 Catalyzed and Dibenzyl amine Centered A(3) coupling reaction: Synthesis, Spectroscopic Proofing and Anti-microbial Efficacy

This research suggests an ideal method for synthesizing propargyl amine adducts by a three-component condensation of dibenzyl amine (DBA), aldehyde, and phenylacetylene (known as A(3) coupling reactions). The aimed synthesis was carried out using a gold catalyst, chlouro auric acid (HAuCl4) and compared with Cu(I) systems to check the involvement of metals to generate enantiomerically pure compounds (4 a-4 j). No major deactivation of the catalyst was observed after repeated use in a similar reaction system (>10 times). The derived motifs & PRIME; spectroscopic profiling (H-1 NMR, C-13 NMR, APT, IR and MS) has confirmed the structural fragments in a single core. Moreover, the applications of the derived motifs confirmed the comparable antimicrobial activity in some selected Gram-positive and Gram-negative bacterial; and fungi strains. Our consequences show that the scaffolds 4 d and 4 i having 4-F and 4-NMe2 substitution in the araldehyde system exhibited potent antimicrobial activity in most used bacterial and fungi strains.